In 1998, when you were still using Windows 95 (or Windows 98 if you're lucky), a cyberpunkyurianime came out of Japan called Serial Experiments Lain. As far as animation quality goes, it was pretty much on par with anything else from that period - no fancy 3D CG or expensive Korean inbetweeners. However, something about the show made it popular enough in America that it's been seen by a large portion of Internet users and the theme song is a cult hit, even becoming certain dramacrats' ringtone.
