Comment by mulmen

Well it means came of age at the turn of the millennium. So the whole online culture thing. Presumably we'd have a pretty good idea what's going on, having lived the whole thing.

The joke used to be that Boomers don't understand the internet, even though they invented it.

Based on that experience I guess it should be no surprise that now Millennials don't understand the web even though we were born on web 1.0, grew up on web 2.0, and created web 3.0.