Why did UI's turn from practical to form over function?
E.g. Office 2003 vs Microsoft 365
It's easy to remember where everything is with a toolbar and menu bar, which allows access to any option in one click and hold move.
Seriously? Big ribbon and massive padding wasting space, as well as the ribbon being clunky to use.
Why did this happen?
The Ribbon isn't the worst thing. It tried to solve the clutter of the previous interface, although I always preferred the old one.
Here is an interesting take on the problem of modern interfaces: https://datagubbe.se/decusab/