I still have my Vive (had it 3.5 years and am debating whether I should just sell it). I think the Quest looks way better with Link. IMO the optics are significantly better and the screens, obviously, are too. I suppose Hz is an individual thing, but with these things all being low persistence, it doesn't really bother me. Motion resolution is still great.
I was playing Dirt Rally the other day and it should have been a game I noticed the difference on, but the image was just so much nicer it wasn't what I was thinking about. I was just thinking about how much nicer it looked on Quest. Same with Polybius. I was playing that two days ago. If any game should make a difference, it's that. But I only thought about the Hz difference much later. When I realized how little I cared and wouldn't have even noticed if I didn't know.
But some people could be physically bothered by 72hz so I'd put it squarely in the YMMV.
The 72hz vs 90hz hasn't bothered me one bit either, although I came from the consumer Rift. I'll be testing out an index for the first time soon and I understand that's a whole other thing.
Everything else is more or less flicker, but apparently the index doesn't feel like it has any flicker at 144hz. I'm interested to find out if my experience lines up with those claims.
Thanks for the feedback!
I was also contemplating to upgrade to the Rift S, but the lack of IPD adjustment and the LCD screen were a deal breaker.