I find the UI clunky and a clear regression from older versions.

A family member has recently written a book on the latest version of MS Word. It's not their first book written with MS Word. It's also not the first time I give a hand to make sure that typography matches publisher requirements. I find that using style sheets has become more complicated, more limited and better hidden with successive versions of MS Word.

Contrast with Apple Pages, in which style sheets are so well integrated in the UI that you barely need to think when you create a new rule.

In fact, I find that even LibreOffice is much better at style sheets these days.

I remember the (not necessarily good) old days when I used MS Word to create character sheets for my tabletop RPGs, or in-game newspapers, etc. These days, I would hate doing this with MS Word – and not just because I'm an open-source aficionado.