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?
Weirdly as someone who has used both styles heavily, I'd say the ribbon is more practical than the old toolbars. There's more contextual grouping and more functional given the tabs and search, plus the modern flat design is less distracting, which is what I'd want from a productivity application. Also for me two rows of toolbars & a menu is about the same height as the ribbon anyway, and you can collapse the ribbon if you want to use the space
I remember people being upset by the ribbon back when office 2007 was released. Their complaints made sense until I sat down and used it. Found it to be a great improvement. I switched my libre office to the ribbon layout as soon as they added it. Because I don't use it often, it's great for finding stuff compared to looking through the menus.
The nice thing about the LO implementation is also that they added a couple of varieties of the design, like the compact one which pushes things closer together so it's not distracting.