It DOES have functionality.. Rated 4 out of 5 stars

there are people that want a SIMPLE way to move a tab to an *existing* window!

unlike those overactive sorts who have no problem with...
- restore window to show desktop
- go to tabs, and drag to desktop , find window that is created, and restore to max
OR: find widow you want to move it to, make it visible at the same time as the source, and then drag...

OR........ right click, join to window, select wanted window...