Just in case you ever consider it for some reason, under no circumstances should you upgrade to Catalina. Worst OS I’ve used since I left windows nearly 20 years ago.
People consider their anecdotal experiences as universal (I offer mine as a single counter example to the parent's experience), when it could be all kinds of weird factors in their case (a faulty hardware run, some incompatible peripherals, user errors attributed to the OS, application errors attributed to the OS and so on).
1) I hated the butterfly keyboard (but fortunately they have changed that now, even if it took them 3 years, unfortunately I'm stuck with a buttefly model myself)
2) I hate the touch strip - at least the restored the Escape button, but I have no use for it and it just sits there (had higher hopes when it was introduced).
3) I'd like more than 1 port in the MacBook (not that I have one, but I read rumours that they plan to release a new MacBook with AS that I'm interested in)
4) What is the genious that designed the mouse that doesn't work while it charges?
5) I know about "price differentiation" but having the black mouse/keyboards more expensive is a dick move.
That said, 2 things I do:
1) At least every 2 OS releases I do a clean new macOS install. No particular concrete reason, but it might help my case having a "cleaner" system.
2) I've never cared/used Time Machine. I use CCC on my own. So I never have the TM related issues some people seem to have.
Scanning with Samsung MFPs in color into PDFs is still broken, but this one is since 10.14 actually. 10.15 just made it worse, because the Samsung scanning app that could be used instead of Image Capture is 32-bit, so the workaround doesn't work anymore.
Most of my problems have been on older machines, so perhaps their QA has tanked.
It was pure curiosity on my part, because I haven’t really experienced any major bugs or problems.
I downgraded to Mojave as I wanted 32bit back, and as a last try before I just gut it for CPU and RAM, and it’ll run for weeks at a time, with me moving, and updates the only thing that had me reboot or shut down.
There is no QA at Apple, they clearly never tested Catalina on a 2013 Mac Pro.
I am likely missing some things that did improve - I don't have the change log on my mind right now - but nothing that jumps in your face right away.
I'm on the Big Sur beta and even this late in the game it's really rough. You're better off upgrading to Catalina and sticking to that than making the jump to Big Sur after it comes out.
But if feedback is not that great I will wait until the second point release at least...