Trust me, I know why it's gone and why it probably won't ever come back, because I swear I was the only person who drank this ****, but it was awesome, way better than regular Pepsi.
Hydrox were better than Oreos. They came out with these things again in '08, but they were only around for about a month, apparently for the 100 year anniversary.
This was my go-to when I was staying up all night playing GameBoy Pokemon and PS1. I don't think I had any other kind of pop from '96-'03. Vault was kind of the same thing, but that was also discontinued on two separate occasions. Apparently Coke just can't compete with Pepsi's Mountain Dew.