Affinity Photo is perfect for me because it does 95% of what I want, and it has really good .psd support so all those gigs of .psds that I have can still be used. It is the first photo app that I'm happy with instead of using PS.
Sure, it has some warts here and there, and it's not as fast a PS...but Adobe has quite a long lead on them. They've done an admirable job catching up as much as they have, and they are constantly developing it, too.
It has a 10-day trial which is a healthy chunk of time to get used to it. I've been using PS since version 5, and I felt comfortable with Affinity Photo after a few hours. I'm not a professional, nor am I a hardcore PS user, but I am very familiar with it. 0 regrets switching so far.
And it will continue to remain standard until professionals demand the right to choose the program they want to work in.
Seriously, professionals whine all the time about Adobe but they aren't taking the steps to break out of the monopoly.
It reminds me of those that day that an iPad can do 99% of what you need to do. So to me, that says I still need a laptop for that last 1%.