As a die-hard .NET/C# developer, I would be curious what you perceive to be the 'bad' side of that coin. I assume something like LINQ would be classified as 'good'?
The other unfortunate is that as C# accretes features, the old still hangs around. Eventually you end up with too many valid ways of doing things, and cruft that either can't be worked around or was never updated.
It's been over a decade since generics were introduced, but I still encounter code using ArrayList today...
We defaulted to PHP and C# in the past.
We have quite some experience training people who just graduated and even people with backgrounds outside of tech.
Training someone from zero to autonomously writing production code is a lot easier in F# compared to PHP and C#.
We educate people in Elm and Haskell and switch over to F# when they’re ready to try building the first real thing end to end.