Age, Genetics and how good your eyes are in general have huge impact on how you perceive anything IRL or on a screen.
What is an indisputable fact, is that anything above 60 FPS makes the image, movement and input smoother.
People who see no benefit above 30 FPS should most likely seek medical...
"Hey all, we can confirm there is a combination of DLC ownership and ESO+ that is causing some of you to not receive surveys. We're working on getting this fixed as quickly as we can. Thank you for all the information! "