Yeah, except they federate. They keep lists about who they federate, defederate, and know of in machine readable format

IDK if you can convince it to run on Linux, but I’ve been pretty happy with paint.net lately

It’s basically a newer project like gimp. It’s got the core abilities and appearance of Photoshop. Feature wise, it’s less than gimp or Photoshop, but what it has works decently well

Most importantly for me, the UX is much better than gimp… Not as good as Photoshop, but I find stuff is usually where I’d expect it to be

Obviously it’s built on .net, so theoretically it could run native on Linux… Not sure if anyone has done the work to make that actually happen