Guess why Microsoft hired Guido and other Python devs, who gets the whole Python experience on VSCode, or introduced Python as better option to Excel, in detriment of .NET addins.
People forget that nowadays .NET is only yet another language on DevDiv, check the developer blogs for all languages.
That was F# failure as well, trying to cater to data science for its relevance, while other Microsoft departments double down on Python.
Jokes aside, not really, however people have to accept to be polyglot, there isn't one language to solve all problems.
Regardless of whatever is in Rust, all AI key frameworks are in C++ and Python.
NVidia, Intel, AMD, Khronos aren't going to start publishing tools in .NET, Rust, Zig, or whatever is our liking.
So anything outside those stacks will always be a second class experience in IDE tooling, debugging, and libraries.
What pure C# inference tooling is out there? I know they have a solid ONNX engine, but not everything runs on ONNX.
I say this as both a Python and .NET developer mind you, but if Microsoft actually built up .NET more seriously to power AI infrastructure, I could see it making a big difference for them. Look at how many game engines use C# as opposed to literally any other programming language. C# could have been a #2 language for AI by now.