Can you name at least two apps that has been abandoned? That hasn't been my experience at all with macOS.

I don't have a single app that was abandoned. BBEdit, 1Password, Little Snitch, MailMate, Tweetbot, Typinator, Rocket, and many more are all still updated when need be. Key note is "need", stable apps do not need constant yearly updates.

In addition, you can say the same thing about Windows. Metro, UWP and previous attempts didn't go anywhere either, their MS Store is pretty much a flop. (Granted, MAS as well).

Linux...it's not bad but there are issues with various UI frameworks, stores, etc. GTK/QT, Flatpak, snap, etc.