Painter once was my main art tool but I hardly use it now. Completion went far ahead in almost every aspect. Still it has a hidden treasure : a depth channel for impasto effects. True 32 bit one.
I am a texture artist working for games and years ago Painter was everything I need. Not anymore. I use Substance , Mari and other soft and hate them all. All them lacking that surface touch and material feeling Painter always provided . Sometimes I open Painter to feel for a moment that old "at home" nostalgia then have to go away. It's absolutely useless for me in its current state.
But all this could be changed with just a few minor additions:
1. Depth blending method of very simple math combining layers based on its depth. Like one in Quixel mixer. basically (Max of layerA and B) - layerA for blending mask
2. Ability to export depth as 16 or 32 bit grayscale image/layer . Somebody did Blender addon for that but I can't even find it anymore
3 . Few live effects/adjustments like turning depth into normal map and hipass+ levels to make cavity maps
4. maybe something like "patch tool" and "inpaint" from Affinity Photo working on both RGBA and Depth in sync
Those features would open a whole new market niche for Painter since I am not alone who hates all that robotic Substance approach Adobe following and I would gladly buy updates every years