I wouldn't include atomics and memory barriers in the "fearless concurrency" category of Rust. Is there really a large enough body of third-party code to worry

I wouldn't include atomics and memory barriers in the "fearless concurrency" category of Rust. Is there really a large enough body of third-party code to worry about compatibility? As for Linus's complaint that compilers aren't perfect, I've seen many bugs over the years with this style of code. A missing memory barrier doesn't exactly stand out. Maybe Linux has a better track record, but I would love to push as much of this as possible into the hands of a "pre-reliable" compiler, where a bug can be fixed once. It seems like they're taking a reasonable and measured approach to start with a small surface area, which bodes well for the future of Rust in Linux.