It's good for concept browsing, but not much more for me at the moment.
I'm assuming the process has gotten better since, but I don't know. I'm mostly just using free vector art and simple colors/shapes or whatever simple things I can make in Blender for my art still, in part because there's such a backlash against using any A.I. art right now.
Most of it is judging by what people have been saying in groups online. Some people have found it very useful and use it extensively, like for their board game art.
It doesn't even have to get 100% of the way there (for coding games based on rulesets). Even 75% would probably save me a lot of time and allow me to find the energy to close the gap as opposed to not even starting since I have so many other projects going on.