Websites are one thing. It really gets annoying when different applications in an operating system "can't agree" on what to use. I've seen both in Debian/Gnome

Websites are one thing. It really gets annoying when different applications in an operating system "can't agree" on what to use. I've seen both in Debian/Gnome apps, but that's kind of to be expected from (F)OSS software as rules for UI are less strict/not very well defined.