I was building an API and started adding some tests, then added coverage and It got me to think about the complex-ness of the codebase, how many branches / stat

I was building an API and started adding some tests, then added coverage and It got me to think about the complex-ness of the codebase, how many branches / statements I had per file to test etc, I think it helps greatly to reason about modular and good software. But it takes time too. YMMV