It's hard enough to get a single programming language to work right. C is old and stable.
Rust is new and mostly stable, mostly stable isn't going to cut it when billions upon billions of devices depend on your work.
At the same time this type of ego driven drama keeps me out of the open source community. I have enough people telling me how to code during my 9-5.
I open source most of my projects, but it's not a collaboration. I'll even admit, I get really annoyed when someone puts in a PR that's literally just a bunch of spacing changes in a readme. I think there was some influencer who was claiming that you should go through GitHub, and submit as many changes for things like grammar as possible to a bunch of different projects .
And then on your resume you can put that you contribute it to all these projects. Not fun.