[dezgeg]

What a weird take, "millions of lines of code, written over decades" applies to quite many C (or C++) codebases where using a high-level language is not a possibility (and companies that do have such codebases are pretty conservative and don't even talk about Rust no matter how great fit it would be).

[bluGill]

In every case I've seen the vast majority might be C, but there are other other languages hidden in there that are hard to find. Many companies would use more languages if it wasn't such a pain. Rust for example would be really nice to use in new code, if only they can figure out how to mix it in.