Evidence That Performing From Memory May Be More Challenging for Pianists Than Others (What?!)

Anecdotally at least, fear of memory slips seems to come up more often for pianists than for some other instruments. Is this because of how many notes they have? Or is there something else about the instrument itself that contributes to an increased risk of memory slips in performance (unless one adjusts their practice habits to account for this)? Evidence That Performing From Memory May Be More Challenging for Pianists Than Others (What?!)* * *BTW, have you ever wondered why it is exactly t...