Its a mickey mouse technique to hold the aircraft off as long as possible until having the stick fully back into your stomach and having the stall warning activating. Sure there are certain aircraft types where this is appropriate (e.g. taildraggers), or certain conditions requiring this (e.g. soft field landing). In all other cases it serves no purpose and all it does is lengthening the landing distance. The landing flare only serves two purposes:
- Bringing the aircraft into the landing attitude, i.e. landing on the main gear before the nose gear.
- Reducing the vertical rate before touchdown.
Holding the aircraft off until having the correct landing attitude, then aiming for a smooth touchdown within the touchdown zone without delay and start braking is the correct technique outside of the exceptions mentioned above. It serves no purpose to prolong the flare past that point, it only eats up more runway. The PPL technique also isn’t transferable onto bigger aircraft.
In professional flight training (I have been involved with ATPL and MPL training for many years) we have moved away from that long time ago. Same as with the “black-and-white” pitch = speed, power = glidepath approach. Works on a Cessna but isn’t transferable onto anything bigger than that. As not to induce negative training we don’t teach it like that anymore.