F# is now supported within the .NET core world so it opens up the deployment scenarios beyond anywhere traditional .NET would live.
In fact, Microsoft has to advocate library writers to actually care about .NET Core and .NET Standard.
https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/NET-St...
Still, for all intents and purposes you are correct - but there's still some growing pains in the tooling that are hard to ignore.
+1000. It wasn't even library support, it was the tooling that was a huge pain in the ass. Half the time it didn't work right, builds broke unexpectedly, build file formats kept changing, cripes what a pain. I swore off it until the early .NET 2.0 standard prereleases when things seemed more stable, and it's been much easier to port my libraries.