It is also interesting to watch people like my mom, who never used another desktop before, learn Ubuntu. Then I showed her a Mac desktop and a Windows one and she said "they are not user friendly" -- I thought was pretty funny.
But I also hear a lot of hate from developers about Ubuntu lately -- "It is not really free", "They changed my Gnome desktop, I'll never use this piece of crap again". "They hate systemd and invented their own thing!. --No, they adopted systemd now. --Oh... ok, well they still have a stupid user interface!". Kind of stuff.
What a bunch of whiners and complainers. Before that it was complaints for a decade -- Linux on desktop. "Year of the Linux Desktop -- such a joke". We had Mandriva, Redhat, Gentoo, others for years and they couldn't create desktop usable for average people -- hardware support was bad, interface sucked, design was bad, still had to use command lines to configure things etc. Then Ubuntu came, tried to do something about it, and while not perfect, made a huge improvement. Now it is possible for normal users to use a Linux desktop and many are using it as such. And because developers use it for development, the server version also ends up in production often.