Provide options for people that get motion sickness the same way we provide accessibility options. Let those of us that get less motion sickness get the "full experience".
So far I'm lucky. I've only got sick in VR twice. Once from trying Breath of the Wild via the Labo VR kit. Once trying a hacked GTA-5 VR. Both made me feels incredibly sick, far beyond what I'd have expected before experiencing it. So, I'm super sad that some people experience this more and I hope we can find ways to accommodate them.
That said, I played Half-Life: Alyx back when it came out. In my mind I assumed teleporting, the default, was the way to play because I assumed stick motion (normal joypad controller based FPS motion) would be more sickening. But, for me, it turned out after a few levels, teleporting felt worse than sliding. I think because each teleport was so disorienting.
Strangely, I got zero motion sickness from Jet Island. One of my top 5 VR experiences of all time and at a glance would also seem to be the most likely game to make people sick. Why it doesn't I'm not sure other than the obvious (fast framerate)
https://store.steampowered.com/app/587220/Jet_Island/
To add, I got a 38inch wide monitor. Playing any first person came on that screen full screen makes me sick. I have to play all PC games in a window now. I think if I switched back to a 27inch monitor I wouldn't have that issue.