It was more a comment on the religious/naked fanboy-ism of rust. (like apple... like java... like vb...)
I think the dude that posted the message is way up there in the kernel tree. So I am assuming he/she knows what they are doing.
But it would be funny to have a countdown.
Given its similarities to c/c++, I’d expect someone to come up to speed in a quarter of the time or less.
The guardrails make it harder to shoot the proverbial foot, but also to get code to compile at all.
Well, at least at the beginning. One becomes used to the so-called "compiler-driven development", at which point it becomes a breeze.