I’d been having routine CTDs immediately or shortly after entering VR. Nothing worked for me in settings or workarounds. I gave up and started playing HLA (the best stand up VR experience possible) and it was crashing too. I checked the HLA forums and apparently this was related commonly to the swap…

VR CTD fix - worked for me

YearlingDeer319 January 30, 2021, 5:40pm 2

In addition to this, many users like to keep the swap file on a separate drive too.