When I was learning about GIMP key shortcuts I was like "Ctrl+A selects everything, Ctrl+Shift+A deselects everything. Makes sense."
And then I went to most of the other apps. "Ctrl+D? Well it's one less keypress, but... WHY?"
To be fair, I get it now, I've used plenty of image editors and I remember the keybinds wherever I am. Just that I sometimes find it annoying that The Other Software hasn't adopted logical keybindings.
(I find it particularly annoying that a lot of image editors try to be fancy and sophisticated and Photoshop-compatible and think it's at all appropriate to use Ctrl+NumpadPlus and Ctrl+NumpadMinus for zooming. Just use what GIMP uses! NumpadPlus and NumpadMinus. It's not hard! What are you using the plain plus and minus for, anyway? Absolutely nothing! I just checked, I need to use Ctrl in Affinity Photo. Plain plus and minus are useless. I see you. ...oh I can just rebind these. Done.)