Examples of where it's done right

> It's been a while since I was actively contributing, but in my experience: KDE.

As a current contributor, I don't know. I don't claim I can read other people's minds, so this is just "anecdata", but there are a few occasions where my line of thinking doesn't align with the one of other KDE contributors, but I prefer to stay quiet rather than just comment, because on the Internet (and outside of it, unfortunately), people are getting quite rabid if you mention issues that are dear to them.