The time is moot in almost all situations as long as it doesn’t take you longer to enter the PIN than it does for a cashier to finish tallying items. The concern I’ve heard businesses raise is that people won’t remember it but that’s also a chicken and egg problem since people will remember what they use regularly.

Of course, since it’s the 2020s and not the 1990s we don’t need either since NFC is widely supported and an Apple/Google device transaction secured by biometrics on the client is far better and already widely supported.