Case you did not get the memo the servers merged long time ago, everyone kept their server names and not everyone was on whitemane nor is every server merged to it.
They should have left a TBC classic and Wrath as they went even if it was just 1 cluster, did not play sod and do not care about it, nor wrath or cata and have not played retail since cata and when i was playing cata was on my 60s still from 2006. Only reason i play wow is cause of classic. I could agree that having 1 new fresh server a year that then merges into era at the end would prob work but also split player base. Ques for games is already too slow and i have zero interest in starting over again i have already done that 16 plus times in 20 years. Also would be nice if all pvp brackets were merged into one, but i know new servers would throw a fit since the gear difference would not be fair.