As a "userspace" Rust developer, I'm happy that this still appears to be close enough to the standard Rust dialect that I could still be productive. I suspect that allocations are intentionally a little more explicit.
It would be cool if there was a few easy-for-beginner tasks to pick up and try my hand at this sort of work.
A big eventual non-technical goal of the Rust for Linux project is to reduce the barrier to entry for kernel programming, Rust is a good language for averting gumption traps IMO †