95% of people who use Photoshop would probably be served just fine by Krita, or even GIMP if they learned the somewhat wonky UI, and would save a ton of money in the process. However, people usually want to use the "standard" because of some vague fear that the alternative isn't 100.00% compatible, or that it won't have some obscure feature that they don't even know about yet, etc. I think Excel is exactly like this today, and so is Word. There are many alternatives that are just as good (and much cheaper) for 99% of users, but people still want to stick with "the standard" instead of taking a small risk on something different.

Maybe in the coming Great Depression of 2025, people will think differently and start looking at cheaper alternatives.