I think Microsoft and Amazon have the most interesting products as far as dev tooling. Unless you're really into ML I guess. Too bad they don't pay as well.
Yes, I actually liked VS Code a lot, and I was an emacs user before that. MSVS is pretty good too. I am still using F# here and there for small, personal projects but I use my iPad Pro (2015) with Frank Kruger's [1] Continuous app[2], an F# and C# IDE with a built-in compiler, syntax highlighting, code completion, and live debugging. Frank is a juggernaut in .NET and many other eclectic things within the tech domain! Check him out. Continuous is the best way to play with code outside of sitting at your desktop, and even then too!
[1] https://praeclarum.org/
[2] http://continuous.codes/