.NET is the most open, non-trivial ecosystem I have ever participated in. I experienced 2 different problems with .NET (back in 2.x/3.x days), and was able to have interaction with the actual MS developers on their Github issue page without any sort of bullshit overhead process. Within days, I saw traction on my comments and within months I saw PRs that ultimately resolved the issue I presented. The following year, I…
being open is not about not paying but using it however you like, not constrained to VisualGarbage XYZ or Windows 15-xtra ultra edition
That's freedom in action. Microsoft has a fork of two open projects which they are working on however they like. If you don't want to use their work, you can fork and develop .Net and VSCodium and OmniSharp however you like. Now look at the the top GitHub comment: "once LSP Tools Host gets full attention, OmniSharp will slowly die out (especially if the OmniSharp team is working on LSP Tools Host). Which is of course the last step, extinguish."
Which says: "I don't want to develop the thing I want to use, and if Microsoft doesn't develop it for me and give it to me for free, this is equivalent to Microsoft extinguishing it".
MIT License grants "rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software", and not "you can have what other people develop on this" or "the developers of this will never make non-free software in future". https://mit-license.org/