For decades, the only thing they needed was clean, easy Action and Macro support.

Most photographers use half a dozen pretty simple actions that they are absolutely incapable of recreating in gimp. Most photogs are technically competant in very VERY narrow fields. Most of them use paint away the ______ which just masks, sets up a specific color channel and lets you math the removal of that color with brushes.

Now, you need to add in context-aware fill, outpainting and sky replacement.