IMHO Apple's design jumped the shark a long time ago. Even apart from the aesthetics of the "flat" look, which I like about as much as fingernails on a chalkboard, Apple has completely abandoned the principles that made the original Mac great: ease of use and discoverability. Once upon a time it was easy to tell where the affordances were, what you could click on, editable vs non-editable text. Nowadays everything lo…
Based on how rough the Jira app is on Catalina, if MacOS is going to see more of that then I think I've had my day with Apple.
The Mac App Store is probably a fairer comparison.