At least that's been my experience: Plenty of OS X apps abandoned after each major update.
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.
Also, the original Overdrive Mac app. I believe they still don't have a replacement Mac app.
The official ReadItLater app, the service is now called Pocket btw.
That Caffeine app to prevent the laptop from sleeping.
iTunes
Adobe Fuse
Google Picasa
Some minor aspects of Dragthing can be replaced with Siracusa’s app Switchglass.
As for Overdrive, does Libby work on the Mac?
And since most of my pro audio apps also stopped working on OS X and the USB dongle works the same with Windows and Mac, I myself also abandoned OS X for productive work.