I love the quest and was just using it about an hour ago. Even beyond motion sickness, it is not the same experience as it was when I first got the quest.

There is a habituation that happens the entire experience becomes far less immersive feeling. I have used the quest so much I don't really feel the immersion anymore at all. I had just found youtube 360 videos of the sphinx and great pyramid last night. I wish I would have watched this a year ago as it would have been so mind blowing. It is still fun but it is nothing like what it use to be. I don't feel like I "go" to the places anymore.

It reminds me quite a bit of the way marijuana was such a different experience the first few times vs the 500th time.

So even if you don't get sick, the magic wears off in about a month and people stop bothering. The experience is so consistent with people getting bored after a month. I can say from experience that this has nothing to do with the lack of content but something to do with the way the brain adjusts.