diff --git a/Package.swift b/Package.swift
index 298dd10b6f..f88ea97464 100644
--- a/Package.swift
+++ b/Package.swift
@@ -129,7 +129,8 @@ let package = Package(
                 "NIOCore",
                 "NIOEmbedded",
                 "NIOPosix",
-            ]
+            ],
+            swiftSettings: strictConcurrencySettings
         ),
         .target(
             name: "_NIOConcurrency",
@@ -274,7 +275,8 @@ let package = Package(
                 "NIOPosix",
                 "NIOCore",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOTCPEchoClient",
@@ -282,7 +284,8 @@ let package = Package(
                 "NIOPosix",
                 "NIOCore",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOEchoServer",
@@ -291,7 +294,8 @@ let package = Package(
                 "NIOCore",
                 "NIOConcurrencyHelpers",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOEchoClient",
@@ -300,7 +304,8 @@ let package = Package(
                 "NIOCore",
                 "NIOConcurrencyHelpers",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOHTTP1Server",
@@ -329,7 +334,8 @@ let package = Package(
                 "NIOCore",
                 "NIOConcurrencyHelpers",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOChatClient",
@@ -338,7 +344,8 @@ let package = Package(
                 "NIOCore",
                 "NIOConcurrencyHelpers",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOWebSocketServer",
@@ -365,7 +372,8 @@ let package = Package(
             dependencies: [
                 "NIOPosix",
                 "NIOCore",
-            ]
+            ],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOUDPEchoServer",
@@ -373,7 +381,8 @@ let package = Package(
                 "NIOPosix",
                 "NIOCore",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOUDPEchoClient",
@@ -381,7 +390,8 @@ let package = Package(
                 "NIOPosix",
                 "NIOCore",
             ],
-            exclude: ["README.md"]
+            exclude: ["README.md"],
+            swiftSettings: strictConcurrencySettings
         ),
         .executableTarget(
             name: "NIOAsyncAwaitDemo",
@@ -511,15 +521,18 @@ let package = Package(
             dependencies: [
                 "NIOCore",
                 "NIOFoundationCompat",
-            ]
+            ],
+            swiftSettings: strictConcurrencySettings
         ),
         .testTarget(
             name: "NIOTests",
-            dependencies: ["NIO"]
+            dependencies: ["NIO"],
+            swiftSettings: strictConcurrencySettings
         ),
         .testTarget(
             name: "NIOSingletonsTests",
-            dependencies: ["NIOCore", "NIOPosix"]
+            dependencies: ["NIOCore", "NIOPosix"],
+            swiftSettings: strictConcurrencySettings
         ),
         .testTarget(
             name: "NIOFileSystemTests",
diff --git a/Sources/NIOChatClient/main.swift b/Sources/NIOChatClient/main.swift
index c41250e39d..a350bf14bf 100644
--- a/Sources/NIOChatClient/main.swift
+++ b/Sources/NIOChatClient/main.swift
@@ -18,19 +18,9 @@ private final class ChatHandler: ChannelInboundHandler {
     public typealias InboundIn = ByteBuffer
     public typealias OutboundOut = ByteBuffer
 
-    private func printByte(_ byte: UInt8) {
-        #if os(Android)
-        print(Character(UnicodeScalar(byte)), terminator: "")
-        #else
-        fputc(Int32(byte), stdout)
-        #endif
-    }
-
     public func channelRead(context: ChannelHandlerContext, data: NIOAny) {
-        var buffer = Self.unwrapInboundIn(data)
-        while let byte: UInt8 = buffer.readInteger() {
-            printByte(byte)
-        }
+        let buffer = Self.unwrapInboundIn(data)
+        print(String(buffer: buffer))
     }
 
     public func errorCaught(context: ChannelHandlerContext, error: Error) {
@@ -47,7 +37,9 @@ let bootstrap = ClientBootstrap(group: group)
     // Enable SO_REUSEADDR.
     .channelOption(.socketOption(.so_reuseaddr), value: 1)
     .channelInitializer { channel in
-        channel.pipeline.addHandler(ChatHandler())
+        channel.eventLoop.makeCompletedFuture {
+            try channel.pipeline.syncOperations.addHandler(ChatHandler())
+        }
     }
 defer {
     try! group.syncShutdownGracefully()
diff --git a/Sources/NIOEchoClient/main.swift b/Sources/NIOEchoClient/main.swift
index d7de8eb35b..e92ebc02ff 100644
--- a/Sources/NIOEchoClient/main.swift
+++ b/Sources/NIOEchoClient/main.swift
@@ -58,7 +58,9 @@ let bootstrap = ClientBootstrap(group: group)
     // Enable SO_REUSEADDR.
     .channelOption(.socketOption(.so_reuseaddr), value: 1)
     .channelInitializer { channel in
-        channel.pipeline.addHandler(EchoHandler())
+        channel.eventLoop.makeCompletedFuture {
+            try channel.pipeline.syncOperations.addHandler(EchoHandler())
+        }
     }
 defer {
     try! group.syncShutdownGracefully()
diff --git a/Sources/NIOMulticastChat/main.swift b/Sources/NIOMulticastChat/main.swift
index 7d3298ee7e..94316e5ecd 100644
--- a/Sources/NIOMulticastChat/main.swift
+++ b/Sources/NIOMulticastChat/main.swift
@@ -72,8 +72,8 @@ let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
 var datagramBootstrap = DatagramBootstrap(group: group)
     .channelOption(.socketOption(.so_reuseaddr), value: 1)
     .channelInitializer { channel in
-        channel.pipeline.addHandler(ChatMessageEncoder()).flatMap {
-            channel.pipeline.addHandler(ChatMessageDecoder())
+        channel.eventLoop.makeCompletedFuture {
+            try channel.pipeline.syncOperations.addHandlers(ChatMessageEncoder(), ChatMessageDecoder())
         }
     }
 
diff --git a/Sources/NIOUDPEchoClient/main.swift b/Sources/NIOUDPEchoClient/main.swift
index 3a74de9d04..9d131b8899 100644
--- a/Sources/NIOUDPEchoClient/main.swift
+++ b/Sources/NIOUDPEchoClient/main.swift
@@ -115,7 +115,7 @@ default:
     connectTarget = .ip(host: defaultHost, sendPort: defaultServerPort, listeningPort: defaultListeningPort)
 }
 
-let remoteAddress = { () -> SocketAddress in
+let remoteAddress = { @Sendable () -> SocketAddress in
     switch connectTarget {
     case .ip(let host, let sendPort, _):
         return try SocketAddress.makeAddressResolvingHost(host, port: sendPort)
@@ -129,7 +129,9 @@ let bootstrap = DatagramBootstrap(group: group)
     // Enable SO_REUSEADDR.
     .channelOption(.socketOption(.so_reuseaddr), value: 1)
     .channelInitializer { channel in
-        channel.pipeline.addHandler(EchoHandler(remoteAddressInitializer: remoteAddress))
+        channel.eventLoop.makeCompletedFuture {
+            try channel.pipeline.syncOperations.addHandler(EchoHandler(remoteAddressInitializer: remoteAddress))
+        }
     }
 defer {
     try! group.syncShutdownGracefully()
diff --git a/Sources/NIOUDPEchoServer/main.swift b/Sources/NIOUDPEchoServer/main.swift
index a33de6780b..f8dd508577 100644
--- a/Sources/NIOUDPEchoServer/main.swift
+++ b/Sources/NIOUDPEchoServer/main.swift
@@ -47,8 +47,9 @@ var bootstrap = DatagramBootstrap(group: group)
 
     // Set the handlers that are applied to the bound channel
     .channelInitializer { channel in
-        // Ensure we don't read faster than we can write by adding the BackPressureHandler into the pipeline.
-        channel.pipeline.addHandler(EchoHandler())
+        channel.eventLoop.makeCompletedFuture {
+            try channel.pipeline.syncOperations.addHandler(EchoHandler())
+        }
     }
 
 defer {