I did have two full classic servers of alts so far level 7 - 14 in classic, but I deleted one from each, as they didn’t fit, and I need to make something else.

As far as retail? I am 3 shy from completely filling one account and have quite a few on a second account, I have 5 max level characters, and 3 more over level 100, all the rest in retail are between 60 - 90.

I play all of my army of alts.