If By "Generational" you mean "every single person that has learned to drive a vehicle from when they were invented, to right now" then perhaps.
This is sort of like people who tried to re design the keyboard that we use for most computer input ("QWERTY") to the "DVORAK" keyboard, because "its faster", except a computer keyboard is not safety signaling equipment.
If all manufacturers simultaneously switched to "no stalks" then people would have no option except to adjust, or, if someone drives only vehicles with no stalks, same thing. If there is any need / desire to swap between vehicles, people should not have to "concentrate" on how to use signals. They just wont use them (like many already dont).