This seems mostly useful in highly constrained embedded environments (AVR, MSP430, ARM M0, PIC etc.) Unfortunately it seems like none of these "modern" system languages (Nim, Rust) seem to be putting too much effort towards embedded platforms :(
I think it's a bit of a shame because that's basically the #1 differentiator with languages like Go or Java as far as I'm concerned.
But beyond that it's true that the language itself has a lot of potential for embedded applications. The runtime can be made almost as tiny as C's and with libcore you get a much nicer and safer "bare metal" environment than what you'd get in C. And thanks to LLVM you can easily target a whole bunch of architectures.
Yup, both of these things are true. This is what I meant by increased support: we have a long way to go to make it as nice to use, and on a stable release of Rust. But the fundamentals are in place.