In-general it seems that Rust proponents want ease and modernity to replace the ability to do the same in C better, with more control and intent, and with better results.
Rust is less tight. That’s fine for an application, but the kernel is used by everyone who uses Linux.
Rustians disparage C because it doesn’t have Rust behavior.
I don't think C should be disparaged at all. Just because I prefer torx screws doesn't mean phillips screws were a horrible idea. They were brilliantly simple and enormously effective. I can't think of a single situation in which I wouldn't prefer torx, but torx wasn't an option historically and phillips was not the wrong decision at the time. Times change.
