Progression Like Server

I tried searching for this if there is already a discussion or post about it, but I either suck with the search feature or typed the wrong thing.

Would there be any chance of implementing a server that is either stuck on a certain expansion or slowly progresses from the previous expansion up to what the current expansion is? I'm not here to say what expansions sucked or what was best, just merely want to understand if this would be something that could become a possibility in the future?

I played in the EQ progression servers and they actually brought A LOT of players back to the game (at least in the beginning, but still more players on there progression then their real servers), so it's not just something I think would benefit some nostalgia people but could actually bring in some more revenue.

Of course maybe some work would need to be tuned to make these kind of servers successful, but IDK how much. Out of all the MMO's I have played this is one of the only ones that hasn't really revamped anything. Sure there has been lots of job adjustments, but most of these adjustments should of been done back in the days anyways. So really, you could just make another server and just say "Hey, we aren't going to allow people to progress past CoP".

I just want to know more about this, due to FFXI being one of my favorite games. If someone has a link to maybe previously discussed stuff like this that would be awesome!