IMO, one of the biggest benefits of "modern" systems languages like Rust, D, Zig is how much easier they make writing and running tests compared to C and C++. Yes, you can write tests for those languages, but it's nowhere near as trivial. And that makes a difference.
I was writing unit tests for C in 1996, naturally we still haven't coined the term, so we just called them automatic tests.
It was part of our data structures and algorithms project, failure to execute the automatic tests meant no admission to the final exam.
We had three sets of tests, those provided initially at the begin of the term, those that we were expected to write ourselves, and a surprise set on the integration week at the end of the semester.
Writing unit tests for c/c++ is trivial. There are perfectly fine test frameworks, used by developers every day, integrated in any major IDE or runnable as one-liner from the command line.
