I quit Affinity Photo for Pixelmator Pro a while back because Affinity Photo is quite a bit slower, and because it mostly just copies Photoshop’s UI, while Pixelmator Pro rethinks and improves the bad parts of Photoshop’s UI while copying the good. In the past Pixelmator (before the Pro) was lacking features, but Pro largely addressed that, and they continue to ship significant improvements regularly. Affinity Photo recently came out with a 2.0 across their suite which may have addressed the pain points, and I’d like to try.