I have no idea.
Being digital, resets could occur anywhere in the evolutionary process — totally or partially. If at the Big Bang level of evolution, then the new rebooted physical universe would be perhaps similar but completely different. If at the PMR history thread level, then the reboot could simply create a new branch point emanating from the same thread — very transparent, no explosion necessary.
In general, a good rule of thumb is: Whatever can happen eventually does happen given enough time. How many? I suspect more in the beginning, then fewer as good productive virtual reality subsystems evolved. One can't do good long term science without stability.