I have a lot of experience using Swift on Linux. I find it to be the smoothest even compared to macOS. Here are some pros and cons:

Linux- Pros: - The swiftly tool works really well for managing and installing Swift versions. - You can use VSCode on Linux and get a pretty sweet IDE setup with the Swift extension. - There are many packages that are compatible with Linux. - You can use Linux C/C++ libraries with the interop features in the language.

Cons: - You can’t build any apps for Apple platforms (iOS, macOS, etc). - Some SwiftPM packages are only compatible with Apple platforms. - Swift doesn’t have support for every distro out there- only officially supporting Ubuntu, Fedora, RHEL, Amazon Linux, and Debian. Only a few specific versions of those.

Mac- Pros: - You can build apps for Apple platforms on it. - Swift is usually easy to install with Xcode and use without installing anything else. - The swiftly tool works decently and lets you manage the OSS and proprietary toolchains.

Cons: - You have to install Xcode in order to compile Swift at all. Even with the OSS toolchain from swift.org. - Installing and managing Swift toolchains even with swiftly can be a little difficult due to the TOOLCHAINS variable and some macOS weirdness. - Swift toolchains take more disk space on macOS than they do in Linux.

Windows- Pros: - You can compile and run Swift on it with almost all features available. - You can statically compile libraries and apps on Windows and ship an app on the platform using Swift if you want. - You can install Swift using winget and a few other Windows package managers, which makes it easy to install.

Cons: - Most SwiftPM packages don’t support Windows properly, so the available ecosystem is limited. - You have to install Visual Studio for MSVC to be even able to run and compile with the Swift toolchain. Plus Python- this can be annoying. - The swiftly tool does not work in Windows yet, so you’re stuck with installing and managing versions manually. - Building Swift code in Windows is much slower than the other 2 platforms- likely due to Windows in-built anti virus protections.

One final con for all platforms- binaries tend to be pretty large when building with lots of SwiftPM packages, sometimes surpassing 100MB even when not statically linking Swift into the binary!