I agree in opening up Seasonal Servers for any Era type of WoW while simultaneously having Perma ones, alongside. Upon the Seasonal Servers self-deleting themselves, there should be a paid service to save/archive said Seasonal Server Characters onto the Perma Servers, of their respective Era Types. Otherwise, when the Seasonal Servers self-delete, all the characters that didn’t get saved/archived, through the paid services, over onto the Perma Servers will go POOF. They’ll NEVER return, even when the new Seasonal Server begins, and I do hope more Seasonal Servers make their way, with breaks in between, to keep that excitement, flare, hype, etc., going. No to NEW Servers that will never self-delete and just clogging up the Perma Server Listing.
That’s my vote.