I'm not sure how many pc gamers would fall in the hybrid graphics camp.
I'm running it on a dedicated graphics card : nvidia 1060 6gb right now, and installing the nvidia drivers was a breeze through adding the ppa. If there is a hybrid graphics situation, can you not just defer to the dedicated gpu only? Or does the dedicated gpu only function as a booster?
The only issue I really had upon switching was that the intel microcode for my i5-4590 had to be installed. The microcode for certain later generation processors like kabylake coffeelake and haswell was producing write errors, and was running extremely slow and choppy. An apt-get install intel-microcode fixed it in about 15 seconds and a reboot though.
That is a good point about photoshop.
Or if you have some kind of removable drive or extra partition. You could dual boot a barebones windows install, say 25gb just to run photoshop and discourage game installation. Any work output could be saved to your linux installation or other storage drive.
Barring things like photoshop, for gamers trying to quit, switching to a linux install meets the needs most users will have, while creating a much larger re-entry barrier, discouraging relapse. I was thinking more about creating distance and barriers for the 90 day detox, than a permanent switch. But, if you end up liking it, why not stay?