I think the primary goal is Mac/Windows/Linux/BSD/iOS/Android on x86/ARM (32bit and 64bit) variants. That covers 99% of consumer and server computing. And aside from anything else: making that secure would be a huge win.
But it's not like Rust doesn't have wide platform support. For example, it's already possible to run Rust on Risc-V. And it's is improving all the time.
Wonder if rust (or llvm) could just have a C backend as a fallback for unsupported architectures. Perhaps some stuff would be slow but likely faster than flat out emulation
llvm had a C backend at one point, but my understanding is that it bitrotted and was removed. I think there's been some work to bring it back? Not 100% sure.
I take no position on Rust other than interested observer; thus the question. There's several factions there, i think the "lets make a better language and spread it everywhere so it gets used" faction ares going to be opposed by the "opinionated zealots of Correct Thinking" and i wonder which gets steamrolled.
