I haven't used Photoshop in about decade, but there isn't many reasons why I use it over Photoshop other than it works on Linux, I don't have to pay a subscription fee, it's not as bloated and resource heavy, and it just works. In fact, I'm much more familiar with GIMP than Photoshop. I'm not a designer/illustrator by any means, but the times I've had to edit photos for whatever reason or do bulk conversion, GIMP did the job well and there's a community providing support.