Microsoft helped bring the original tensorflow to windows. https://developers.googleblog.com/2016/11/tensorflow-0-12-adds-support-for-windows.html
Since then Microsoft has invested a lot more time on homegrown AI tools, I do not think they would allocate any resources for tools like Swift for TF to run on Windows.
I wonder how complicated is Swift’s runtime compared with rust’s running on windows
Once we have great runtime support then we can worry about better tooling on windows for development.