I was 11 when I took this screenshot - Ubuntu 14.04 running on my very first (incredibly bad) PC. As I recall, I couldn’t install Windows 7 without a DVD drive, and that was out of my budget :p
Pretty sure I had it riced out with the Compiz cube and everything.
To this day no DE does Global Menu/Window Buttons integrated in the panel as well as Unity.
Not even KDE.
Exactly. Mate tried emulating this behaviour, but it wasn’t very successful.
As far as I know Ubuntu had to patch a lot of packages to make it work properly. I guess no one has the manpower to do that for such a niche feature.