Sorry, I could not read all answers in detail but I wanted to point that you may not be aware that there is an industry called VFX, encompassing studios like ILM, Weta, Method, Disney, or Pixar. Those represent thousand of artist boxes all running on Linux with fully licensed software and who had to suffer for a decade with Gimp, Windows VMs or Dual Boots when willing to edit an image. These companies would certainly be delighted to purchase a large amount of Affinity Photo licenses to solve their problem. Just to clarify, organizations like those work with a high level of security and are generally operating on closed networks without direct internet access. For this reason, the browser market share charts I have seen floating around cannot be a good indicator for potential users running on Linux.