Legacy servers aren't marketed for or created for current version players. That's not to say that none of them wouldn't at least try it. But these servers are created for old players who aren't happy with the direction the game took.

Everquest is getting it's 25th expansion next week. They started making legacy servers in 2011 and release one every 2 years or so now. 8 expansions have been released since 2011. We could ask Everquest players how they feel about legacy servers "taking away" from current version development and staff.