The Rust community reminds me a lot of Bitcoin. You cannot say anything without a reply-guy telling you why you're wrong, even if it's just something minor. I already see all kinds of "it's in the kernel" posts in here too. (Hint: it's "in the kernel" is actually an argument against its use for, say, the web--not for it.)
This is just another instance of the tired cycle of people not understanding most problems in tech need evolution, even though the big things come from revolution. Just look at how mad people get about Apple's "forced obsolescence." You cannot start everything from scratch even for revolutionary gains.
Are there revolutionary gains with Rust? Well, I don't think it should be that hard to make revolutionary gains over a language that's the same age as I am. It would probably be better if everything was written from the ground up, but unless AI does it for us, that's a lot of wasted man-hours.
Apple still hasn't rewritten its entire stack in Swift, much less its kernel, and no one in the industry moves much faster than they do.
I would definitely consider starting any PC-based project (Rust doesn't very many platforms) that I might have used C++ or C for in Rust. And I prefer to used either a very low level language or a very high level language or two together (e.g., asm libraries with Python) and maybe one day Rust will work for me for that, though it has a huge runtime too. Mostly that doesn't matter.
I just try not to blame the language and it's good features for the obnoxious reply-guy cults that surround it. There are worse languages with good communities and definitely worse communities out there.
But no, I don't want to rewrite my MODplayer from 1990 in Rust.