Anything similar for Windows and Linux?
For Windows there's a 5 year old blog post: https://www.swift.org/blog/swift-on-windows/
For Linux there's a guide for GNOME: https://www.swift.org/blog/adwaita-swift/
It would be really nice if instead we could just do one style of development and then ship a set of libraries as used to work for OpenSTEP (which was why it had "OPEN" in the name).
I haven't shipped any Swift on Windows myself but I have a production Linux system using Swift (and C++ interop) and it works really well
Swift on Windows has been part of the official distribution for a long time:
https://www.swift.org/install/windows/