- Word, PowerPoint, Excel, all one style - Teams, different style - Notepad, different style - Paint, different style
That's just within the MS ecosystem, leave that ecosystem and you rapidly find the same style mess that you get on Linux. It's basically due to the many different GUI frameworks, not the OS itself, hell MS supplies a whole list of frameworks that look different from each other.
Even MacOS/iOS which are _really_ good at having a cohesive UI style suffer from this problem.
I'd argue that if this is a valid complaint with Linux DEs (be it GNOME/KDE/what have you) then it's an equally valid complaint for Windows.
And it has even less configurability than Windows.. Add-ons don't count because they often break.
The borders don't seem that much bigger than the ones in Windows 10. As for the extensions, I've been enabling those via extensions.gnome.org and have no problems so far on Buster or Bullseye.
This is the one that makes Gnome useable for me:
Cinnamon suffers from the same problem, FWIW.
edit: google says "british". In fairly common use in Australia.