I guess nothing stops us from running one tab per window but I have to say I'm not keen to go back to that. What we be the advantage there over tabs in your opinion?
* group windows in virtual desktop
* search by title
* put side by side
* display fullscreen
* manage shortcuts
Some window managers can't. Browser work around with tabs. It's fine for most of the users, it's missing opportunity for some. At least I was not able to disable tabs completely.
And why WOULDN'T you want to be able to move any tab to any edge (top, bottom, left, right) of any window?
And why WOULDN'T you want to be able to group and stack and tile tabbed windows from different applications together?