I remember reading that DOS4 article a while back, which is why I mentioned it. I always thought the protected mode thing "DOS4GW" needed for Doom had something to do with DOS4. Actually, I didn't "always" think that, only recently.

So there was IPv5? Maybe it was IPv3 that was skipped. One of them was "reserved" for testing or something.

And yes, Winamp 3 was so bloated it seemed like an entire OS as a media player. As I always say, Winamp 1.55 forever.