Some people are more sensitive to low frame rates than others. If the motion I’m seeing doesn’t match the motion I’m feeling, I get nauseous. Many people can’t do VR at all because of that. For me, if it’s not 60 fps or higher, I get dizzy and nauseous. Considering everything else I have runs at 60+ (most at a locked 90 fps, matching my 90Hz HMD, I never have an issue.