I never managed to afford a version of freestanding Photoshop, you're very fortunate
I'm using Affinity and On1 at the moment. Affinity is missing a few PS features, but has some unique ones of it's own. The main gripe is that macros are very poor in Affinity. But I never really used those much in PS when I had it. I still have a licence for LR 4.4, but ti doesn't understand the RAW files from my bridge camera.