A big part of it is modern diapers keep them so dry unless they're absolutely soaked that the feedback loop of "have to go" and "now I'm uncomfortably wet" is s

A big part of it is modern diapers keep them so dry unless they're absolutely soaked that the feedback loop of "have to go" and "now I'm uncomfortably wet" is snapped. The difference between modern "swaddlers" and "training pants" is basically the absorbance.