[comex]

We’ll see. As far as I know, the biggest blocker to using Rust outside of drivers is the fact that LLVM lacks support for some architectures Linux supports. And rustc_codegen_gcc seems on track to fix that eventually; even if it takes years more, that’s not much time on the scale of Linux’s development history.

[max_k]

That wouldn't solve the hard problems I meant. Rust portability is an easy problem - it's clear how to port Rust to more architectures, just nobody has done it. But doing interop between Rust and C in both directions, with complicated things like RCU in between - that is a hard and complex problem.