@atoponce @cks Well given uutils grabs coreutils testsuite I wouldn't be too worried on that part, at least not much more than going from one coreutils version to the other given that those break API.

What worries me more about uutils is it's maintenance, it's a pretty large codebase and with quite a lot of dependencies so unlike a C codebase with mostly just a Unix-like libc as dependency I'd expect a lot more churn.