Another exception is when the dev understands the subject too well in a way that distorts their view of what's simple for them and for every one else.

Or, it started as an actual simple library that everyone used so the dev kept adding things and it ended up as a huge thing that stopped being simple long ago, but the dev never updated the name.

If any of you have worked in software dev long enough you know 1 or 2 examples of these two cases :)