Stupid question, but doesn't rust have it's own, highly praised compiler? I'm just genuinely curious - would using gcc be better under any practical circumstance? Do they both generate low level code with/for LLVM?
Actually, if they can provide a stable release with the most important nightly features I might pick this over rustc.
The rust team don't seem to understand anything about production software, quality assurance and maintenance. Hopefully competing with a more organised compiler with TLS support that is not crippled will put some pressure on them.