I can share some insight here. I got into .NET (Core) by virtue of joining a company that used it, after previously focusing mostly on Python and JavaScript (with a self-taught background in C going back to childhood prior to that).

Initially I had the same tribalism that a lot of people seem to have towards .NET, for whatever reason. Eventually though, my conclusions:

- .NET Core is pretty reasonable. Platform agnostic, easy to work with, decent command-line tooling, and doesn't force you into an IDE vertical unless you want to. - C# can be a nice language for certain types of business applications. I think it has a lot of the good modeling properties that once made Java the de-facto language for enterprise development, without some of the verbosity and other drawbacks (though maybe Java has changed too since I last looked at it :) ). It plays very nicely with Domain Driven Design and event sourcing, both of which are patterns that I find valudable on large-scale systems for managing business transactions.

Overall TLDR: I probably wouldn't use .NET if I started a company tomorrow, but when I start coding non-trivially sized things in Python I sometimes miss elements of what .NET/C# brings (particularly interfaces, which obviously also exist in other languages).