There's always going to be pushback on new ideas. He's basically asking people questions like "Hey how does your thing work? I want to write it in rust." and gets the answer "I'm not going to learn rust.".

I think rust is generally a good thing and with a good amount of tests to enforce behavior it's possible to a functionally equivalent copy of the current code with no memory issues in future maintenance of it. Rewriting things in rust will also force people to clarify the behavior and all possible theoretical paths a software can take.

I'm not gonna lie though, if I would have worked on software for 20 years and people would introduce component that's written in another language my first reaction would be "this feels like a bad idea and doesn't seem necessary".

I really hope that the kernel starts taking rust seriously, it's a great tool and I think it's way easier to write correct code in rust than C. C is simple but lacks the guardrails of modern languages which rust has.

The process of moving to rust is happening but it's going to take a really long time. It's a timescale current maintainers don't really need to worry about since they'll be retired anyway.