Multi-boxers rejoice! A server has surfaced (and have been around for a while) that is designed for Multi-boxers! Don't know how to multi-box but want to learn? Good news! You can! Sponsored by the legendary Furyswipes (From Vanilla Gaming) Multibox WoW.
https://multiboxwow.com/
Few things to point out for QoL updates;
All keys (except BWL) that you *could* use in IF (left of the bank) or Org (Kaja left of AH).
Rogue poisons (I believe a universal trainer trains the abilities for it)
Free training.
You can do dungeons as a raid. (I.E you can take 40 people into RFC)
All loot is x2 (In dungeons/raids)
No EXP lose for doing said dungeons as raids.
There's a POSSIBILITY of getting level 60 for free (Talk to one of the GM's in discord they'll hook you up)
A "free item" from the boss you kill in raids (If you kill Veno you get a Veno item, etc)
Universal Trainer in all cities, that act as a trainer for every class.
Free respecs.
Dual Spec (25G)
I imagine there is more, come check us out, tons of people playing.
~~~NOTE~~~ If you are a solo player, who plays 1 toon you are probably going to have a bad time here. This server is really designed for people who box anywhere from 5-40. I mean if you box 20 there are plenty of 20 boxers (like myself) who would take their 20 and your 20 to raid MC or what not.
Just come in discord and ask questions! There's guides how to start and do the multibox on the website, and in discord and PLENTY of people to help!