Aren't there companies that still use C89 for their production systems? I don't know any in particular but I have read comments here on HN implying that. Just d

Aren't there companies that still use C89 for their production systems? I don't know any in particular but I have read comments here on HN implying that. Just do the same for Rust. Stick to the one major version you started with instead of trying to update the toolchain regularly.