I'd suggest to you to consider that the VR is not the issue. DPDR is often an anxiety issue, one that you sometimes reach out to other events in your life to blame.
This is hard to answer, I've quit cold turkey since my DPDR developed 5 months ago. It hasn't gone away since then. It comes in waves. I just want to put this out there first: DPDR sucks. It's maybe the worst feeling I've ever felt. You feel completely alone. That your memories are not real. That you aren't the person you see in the mirror. At times even loved ones seem fake. It's scary. If you think you may be susceptible, stay away from VR. It's not worth it.
I don't think VR is the main cause of it, but I also don't think it would have happened without it.
I've been using VR for 3 years now on and off. Mostly off. About a year ago, after my longest VR session of ~1hr I felt DPDR for the first time and the effects of that lasted up to a few hours.
Around 5 months ago DPDR was triggered, but I was not using VR when it was happened. I don't think it would have been triggered without VR, but these all played a large role too:
1. I moved to a completely new city for the first time. 1.5 years ago
2. my best from from my hometown visited me the weekend it was triggered. 5 months ago
3. a stressful night the moment it was triggered. 5 months ago. stress was the trigger.
It's hard to say what role VR played. Clearly it was not the actual trigger. But I think it was large a part for a few reasons:
1. The feelings of DPDR after my trigger is essentially the same feelings as when it was temporarily induced from VR before the trigger
2. VR was my introduction to depersonalization. The first time I felt DP was from VR. 8 through 5 months ago.
3. I have never had anxiety problems or any mental health problems before.
4. ive been stressed plenty of times before =)
I think VR should best be avoided for anyone that is may be susceptible to DPDR.
Glad to see people are beginning to report on it more.