I used to be a Photoshop customer but when they went entirely to CC I decided to look for a different editor. It was not the cost of $10/month that bothered me as I spent more than that on upgrades, but the idea that if I decided to stop paying I would have nothing left to use.
I have been an Affinity Photo beta tester for a very long time, well before they issued the first MAS release, and am perfectly comfortable with it. However they are not able to run most plugins due, they tell us, to the Apple Store restrictions, so I have looked for ways to run the Topaz plugins and now Topaz Studio. Unfortunately Affinity Photo does not run external programs or all of this would be moot, so I am stuck with the plugins. I used to think that photoFXLab would solve my problems but it, too, proved to be less than robust when run from Affinity Photo.
That leaves me (and my Mac) with PhotoLine. It does run external programs as well as plugins, but plugins just seem to be a more natural way to call Topaz functionality. As for ACDSee, the last time I looked (which was some time ago) they did not have a full editor for the Mac, only for Windows. I will look again.
I have downloaded and installed the new ACDSee solution for the Mac,but it is a simple workflow tool with no layers support and no way to call either plugins or external apps, so it is useless for me when it comes to Topaz Studio.