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... and after an hour decided, that Unity is actually not that bad. Almost every change Gnome3 did over Gnome2 was a change for the worse or for far worse. Unnecessary waste of space on meaningless panels, unnecessarily revamped menus, etc. Just no. I didn't dive in this matter in detail, but people were saying that Gnome3 team has a rather hostile attitude towards criticism, and it shows in the results.
Anyway, after a few years of using Unity I got used to it and was sad when it was killed. Hope it gets the second chance.