F# can be installed and used without visual studio.
My questions concern the other side of the coin. Is it possible to upgrade F# keeping the same version of Visual Studio? How to do that?
The language is fast moving. The F# ecosystem has already moved forward from version 3.0 to 3.1.1 yet Visual FSharp Tools 3.1.1 only supports Visual Studio 2013. On the other hand, we do not plan to upgrade our VS 2012 licenses anytime soon.
In theory Visual Studio should be independent from the version of FSharp tools running under the hood. However, how do IntelliSense and the Fsi fit in the picture?