I used Affinity Photo in my generative art; I also own Photoshop and use it for a few things, but it's rare. AP is faster at many things that matter to me, the UI is much cleaner, and it suits me just fine despite occasional issues (mostly memory related, their memory management sucks). Many of Photoshop's AI "features" are useless to me since they can only do tiny images (basically the usual 1MP that AI can manage). PS is a giant pile of features, but the UI is often a giant pile of complexity because of it.