- The Affinity suite
- Corel Painter
and perhaps a few others. They do their job of paying their developers, cultivating artist communities, doing R&D and pricing their products at something reasonable for the average artist.
I actually ended up more heavily switching to Krita though, just because I could install it on machines that weren't "mine" without worrying about the license, and it was enough for my purposes in most cases.
I use Pixelmator (Pro) on macOS. Flat fee (buy to use), though I use it for basic things.
If I need any kinda simpler editing I just use this.
Started using it years ago - corel bought it I think, and they did not kill it thank goodness.
It's easy for me, easy for me to teach other complete noobs how to do most things with it, and no subscription for internet required to work.
(A pity the Corel Draw license in the bundle is for a -subscription- model license.- ... not a lifetime license.)
It's great and free (as in beer) even for commercial use.