Fitness. It is much easier to grind in a VR game for an hour than it is to grind on a treadmill for the same amount of time.
I have a Quest, the games suck, but the fitness experience is paradigm changing. Beat Saber was and still is the Quest's killer app, but there are lot of similar games that keep the experience somewhat fresh (not to mention new beat saber music packs, I also use FitXR more than Beat Saber).
I bought my Quest back in May 2019, it died around June 2020, but I was already using it a couple of hours a day by then so had to get a new one from a scalper (during the Pandemic, Quest units were hard to get). I really don't want to go back to life without it.