The last time I gave F# a shot, I tried to write a simple Telegram bot in it.
Just to test how much I would actually benefit from the .NET ecosystem, I chose to use a C# wrapper for the Telegram API. Suddenly I had to handle null references and exceptions everywhere (it's in this regard even worse than Rust, where I'm guaranteed to get Options and Results).
I know proper support for C# T? type interop is in the works (https://github.com/dotnet/fsharp/pull/15181), but really it seemed to me that too few cared about F# to get it landed in a reasonable timeframe.
I'd really love to see a pragmatic FP language with a reasonable amount of libs to choose from (both natively and via interop without much effort), but F# was a bit far from that description IMO.
Right, but like the curse of guest languages (which F# isn't one), they decided to create their own ecosystem.
So using .NET libraries directly is frowned upon, while some of them like GUI frameworks, expect C# features (like Roslyn and Code Generators) not available in F#.
You have access to the entire .net ecosystem?