Several things come to mind for me... First and foremost, based on the title of the post, I was looking for a thread with advice, observations, etc., about switching from Photoshop to APhoto. I spent 25 years working in high tech and enterprise software development. I spent a long time working on my Adobe certification and have been a user since the first Windows version in 1987, along with Aldus Photostyler and Micrographix Picture Publisher - all of which wound up being acquired by Adobe and rolled into what we call Photoshop today. I like Photoshop, but also feel it has become cumbersome and ultimately expensive, particularly when compared to APhoto which, aside from UI differences, does a good job and at $50.
Similarly, I was never an adopter of Adobe Illustrator and have always favored CorelDRAW for a variety of reasons. I now own ADesigner and was able to turn out a show poster using it, out of the box with almost no pressing F1, in about 3 hours.
So, while I have no interest in an Adobe vs. Affinity debate, I will say I've been impressed with Affinity's commitment to delivery functional code. It would be extremely helpful, if it's not already done, to have a literal "I'm switching from Adobe Photoshop/Illustrator to Affinity Photo/Designer" document, blog, thread, etc.