I'm familiar with Serif's history, but my concern still remains. As I said, I'm not a developer, but I do work with a lot of GPU programmers. With OpenGL being deprecated on Mac and the rise of it's modern replacement, Metal, there's really no Windows equivalent. There's Vulkan, but I believe that is still in it's infancy if I'm not mistaken? That being the case, it's entirely feasible that the future of Affinity products is one where Mac versions greatly out perform Windows versions to the point that Windows sales become over-shadowed, and it's no longer worth maintaining 2 separate code bases, relying on two separate APIs.
I realize I'm raising concerns that are hard to answer on a public forum, and I mean no disrespect. I love you guys! But I also love the freedom of building my own systems, and don't want to have to shell out for the new Mac Pro Cheese Grater when I could built a system just as powerful for a fraction of the price.