The fact that we're even debating it shows that they do. And I didn't ask for "an exact line". I asked for anything. What is your qualification for a "micro" library? I'm betting it's different from 9 other respondents. That's a problem.

Furthermore, that's not even the main contention I was highlighting. Without a proper definition, the advice of "just copy/paste these" is dangerous. Someone will draw their line at something too large, copy/paste that in and inherit bugs/vulnerabilities they never fix. That's a big problem.