If nothing else, this shows the arbitrary nature of generational cohorts. Get a millennial born in '84 and a millennial born in '94 chatting about Harry Potter and you'll have one person who never read them and doesn't give a fuck and one perfectly timed superfan. Similarly if get two zoomers, one born in '96 and the other in '06, to do the same and you will also get one perfectly timed superfan and one person who missed it completely and doesn't give a fuck.