My big problem with Krita is just the plugins. Photoshop aggregated plugins to export to a ton of incidental file formats, and the plugins were all platform agnostic. Krita however, there's no way of telling if you can export to a given format such as .exif, .dds, or .dpx, and if there is whether that export plugin is supported by your operating system. I've had an issue before where a plugin only worked with Windows 10 prior to a certain update and didn't work in Linux because there was an issue where the AppImage was trying to load something via WINE outside of the container and failing because AppImages can't load Windows native libraries without some setup. It's just small things like that which prevent less dedicated people from leaving the abusive grasp of Adobe.