I'm another long time but occasional Photoshop user who doesn't know all the Photoshop hotkeys very well. I've been quite happy with Affinity as a replacement so far, and haven't looked back.
The controls are a little different, which I imagine would be annoying to a hardcore Photoshop user who has used it every day and developed deeply ingrained muscle memory. For a more casual user such as myself, it's not a big deal. I have to look things up in the (well written, comprehensive) documentation sometimes, I learn the new Affinity equivalent command, and it's fine. The learning curve has overall been much better than I anticipated.
The controls are a little different, which I imagine would be annoying to a hardcore Photoshop user who has used it every day and developed deeply ingrained muscle memory. For a more casual user such as myself, it's not a big deal. I have to look things up in the (well written, comprehensive) documentation sometimes, I learn the new Affinity equivalent command, and it's fine. The learning curve has overall been much better than I anticipated.