I have put over 9k hours of play time since i got my vive in 2018. usually play for about 2h at a stretch 7 times a week. VR has destroyed my ability to play flat games, I just can't put more than a half hour into them these days. Usually load a game, look at the main menu, may start the game then in a few mins, turn it off.

I play mil sim, zombie shooter, vr mods of flat games I have enjoyed in the past like raft and The Forest.

When I first started there was a time i couldn't play long but after a month 2h was no issue except for tiredness.