Here’s something you’d never find on Windows or Mac. This is part of a description of changes made during a regular operating system update on Ubuntu:
Some idiot thought it’d be a good idea if device mapper didn’t respond to “add” events, like those during boot. Take their change out back and shoot it in the head. LP: #561390.
The link is for the issue tracking the bug, and if you look at the bottom some are not happy by the ‘idiot’ remark. I don’t have an opinion on that, but what I love is that this kind of transparency is made so visible to the curious end user.