Keala you keep talking like the only people who play legacy servers are hardcore raiders that clear content and then leave. Many of us play because we enjoy the world, lore, smaller group content or PVP. I highly doubt the server will be dead weeks after Naxx is released. Elysium is just way too crowded for me, I can't stand playing on a server with 6k+ people online, it's crazy.
I would love to see Anathema roll forward into TBC sometime in the future though.