When you have a baby one of the many things you don't expect to use indefinitely is nappies. You look in to the not so distance future and envisage *the joys of* potty training and eventually a nappy-free life.
Before you have a baby everyone has a story to share or a warning to give. You take it all in, some of it you disregard convinced it will be different for you. Other stuff, no one tells you, and perhaps it's best that way.