Perhaps it's worth taking a different viewpoint. With VS 2017, no single release updates every part of the product to the latest things. For example, UWP does not support .NET Standard 2.0 yet. That did not put the VS 2017 15.3 release on hold. Similarly, although F# fully supports .NET Core and .NET Standard 2.0 with this release, the tooling quality wasn't high enough for us to declare the associated tooling support in VS as fully supported. That also did not put the VS 2017 15.3 release on hold. This because we're already three updates into Visual Studio, and it's only been 6 months since its release. Visual Studio updates faster and teams can release things easier and more rapidly without needing to wait for everything else. This is a really good thing.

Point taken, but apparently Microsoft employees keep forgeting F# is part of .NET, or isn't EditorConfig at all relevant for F#?

https://docs.microsoft.com/en-us/visualstudio/ide/editorconf...

This, and also VS2017 did in fact ship C# without some things (for instance, full support for value tuples).

This is minor compared to all the major things VS isn't shipping for many years in a row now.