I miss it, too, but when talking to people in the community most reacted just like Balendin explained. I do think there is an opportunity for an oldschool /world revamp server, but it's got to be done right and be feature complete (quests, acts, timespaces, PvP etc).
My vision would be to include all the SPs and even some of the newer content, but revamp the way you traverse through the acts, add quests etc. But that is a monumental task and the community is very small. If there was ever a server like that, I'd be more than thrilled to work on it. But until then...