The one thing I’ve been dissatisfied with Photoshop for, in comparison to another app, is its traditional media analogues do not come even close to Painter’s, and I’ve not been able to get any brushes set up in a way that replicates them. There’s professionals that use Painter in addition to Photoshop because of that, and I expect I will as well - but I really notice the features missing that I use a lot in Photoshop.