Ya, when switching between the modes, you can really feel the difference. Funnily enough, Jedi Survivor was one of the few games I actually preferred the 30fps mode. Even with VRR, the performance mode was just too inconsistent for me.

I would really like to see a balanced, 40fps mode on Starfield. If they can't consistently maintain the 60fps mode, at least offer some choice for people who want a higher framerate, even if there are other concessions (ie. inconsistent performance).