Now even 60 can feel sluggish.
That’s more or less the placebo effect at work, though. Most people cannot see “faster” than 60FPS; the only actual upside of running higher FPS rate is that you don’t go below 60 in case the game starts to lag for whatever reason. Now, you may be one of the few who actually see perceive changes better than normal, but for the vast majority, it’s more or less just placebo.