It's pretty true from recent experience. I've recently started rewriting a C# based desktop/window stream tool because of how weak the support is across the board for C#. Microsoft abandoned WinRTC, Sipsorcery is one guy and is missing VP9 HEVC and AV1 support. And for fancier stuff like using computer shaders for color space conversion, SharpDX is constantly referenced by chatgpt and MS docs, yet it's archived and unmaintained as well. I ended up using media streams VideoFrame class but it and two other classes required to interact with it have unpreventable thread and memory leaks built into the WinRT implementations themselves 4+ years ago. Good times.

All of the above was easy to implement in Rust