As soon as you try a G2, there's no way you'll want to go back to the screen door, move backwards away from the comfortable facial and head strap, and the audio that'll blow your mind compared to the Quest.
I think that's the case with PC VR, but the Quest is primarily a portable platform, and in that case I'm happy to exchange visual fidelity and performance for wireless and the ability to do VR away from my PC. I definitely couldn't go back to my CV1 from using the Index though...