On the other hand, using ordinary tools like find and grep are exactly what I like about monorepos! Yes, they may take a while, but at least I know I'll find a file or code that I'm looking for!

With multi-repos I'm constantly searching, but not finding where a particular piece of code comes from. Yes, it's from library X, but where there heck does that live? Now I really can't use ordinary tools. I have to rely on coworkers, docs, or GitLab to search for where a piece of code is actually defined.