“ One of the tenets of Classic WoW is none of the cross-server realms and different [server] sharding options that we have available to us today. There’s a lot of desire on part of the community that this is something that they don’t want. ”
https://www.pcgamer.com/this-is-how-blizzard-plans-to-finally-bring-back-vanilla-wow-servers/
I don’t want sharding either.