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I believe conventionally they're called the Rust Evangelism Strike Force.
And it's true that the rotten wood was better than nothing. Nobody is suggesting that NT or Linux should somehow have been developed in Rust in the 1990s. But likewise we shouldn't resist renewal in newer, better materials.
That applies to compiler internals too. Plenty of trouble down there for C++, it's just that C++ programmers can more often be sent away by assuring them that what they did was UB and so LLVM is entitled to miscompile it whereas the Rust people keep arriving with the receipts, in the form of LLVM IR that is lowered to machine code which makes no sense
e.g. https://github.com/llvm/llvm-project/issues/45725
Very few things in those companies are being written in Rust, and half of those projects chose Rust around ideological reasons rather than technical, with plenty of 'unsafe' thrown in for performance reasons
https://github.com/firecracker-microvm/firecracker/search?q=...
The fact that 'unsafe' even exists in Rust means it's no better than C with some macros.
Don't get me wrong, Rust has it's place, like all the other languages that came about for various reasons, but it's not going to gain wide adoption.
Future of programming consists of 2 languages - something like C that has a small instruction set for adopting to new hardware, and something that is very high level, higher than Python with LLM in the background. Everything in the middle is fodder.