Yeah, Rust is pretty high on the list of candidates, but for instance there is no rust compiler shipped by default in Debian stable, so I don't think it meets "

Yeah, Rust is pretty high on the list of candidates, but for instance there is no rust compiler shipped by default in Debian stable, so I don't think it meets "widespread distro support" yet. Also https://doc.rust-lang.org/book/getting-started.html https://doc.rust-lang.org/book/getting-started.html says that everything not x86 is at best only in tier 2 "guaranteed to build", which is not really great on the "support multiple architectures" front; and lack of s390x host support would be a dealbreaker (it's a firmly supported host for running KVM on).