As another over 40 (way over) user with experience in designing user interfaces, I strongly agree with Alex and Phil. This minimalist approach might have been more useful a couple of decades back when we were using small CRT monitors. But with a flat screen
monitor bigger than my family TV when I first got married (60's), I have plenty of screen real estate now and I like my options available with as few clicks as possible. That's why I'm still using IE instead of Edge.
There are many things I like about both Windows 10 and Office 365, but were some things "fixed" that weren't broken. As someone who spends hours a day in Office, I could go on and on, but this isn't the venue for that. I want to underscore what Alex (and
many others whose posts I've read) said: I think Microsoft (aka Micro$oft ), ignores a LOT of user input that does not align with where they already want to go. I have been sending them comments for years about some specific (still unfixed) things and these
sites are replete with complaints about problems that have persisted since Windows 10 Beta.
Maybe a saying I head long ago applies: "Once a bureaucracy reaches a certain size it no longer needs any contact with the outside world."