Most of what people do in photoshop is easier in a node based system anyway since you can made a non destructive graph of operations. The biggest downside is th

Most of what people do in photoshop is easier in a node based system anyway since you can made a non destructive graph of operations. The biggest downside is that the best program is nuke, which is expensive, but anyone can use fusion for free or pay a few hundred dollars for a lower tier of houdini and use those image manipulations. Houdini also allows vex shaders out of nodes, which is basically a more polished version of this interface where you can manipulation pixels more directly and make your own nodes.