Earlier quoted context omitted.
Not sure if the two of you are disagreeing or not, so genuinely asking: Could it be that you are both right? As in, you should stop right away when you start getting motion sick, but with time it will get better? Something like: play 15 minutes everyday, stop as soon as you are sick, and after a while you will be able to play 30min, etc. I have no idea, just asking for a friend :-).
Maybe it differs on why you get motion sickness? Is it because the screens lag behind your movement with x millisecons or is it becase the eyes detect movement but the balance does not? Or a combination? I'm guessing it's easier to get used to the motion/display lag than the balance sence issues.
Maybe, but people who work on boats surely get used to it. So it seems like it is possible for some people to some extent :-).