What are the differences you start noticing between older and younger Millennials?

one of the differences I started to notice between older and younger millennials is probably how younger Millennials associate with Spongebob. am not hating this show it's just I was a bit too old when Spongebob came out in 1999 and I wasn't interested in cartoons since I was watching other stuff. before Spongebob aired I watch Rugrats, Doug, Rocko's modern life, and other cartoons which I think they associated with older Millennials the most.