Well they already took some of their dev servers and used them to help out the login servers.

Making them into worlds... might be possible. SE already has the infrastructure in place for world visit and that "pick the least congested server to login to", so that would seem like the probably-biggest technical hurdles done.

But taking more servers from dev impacts, well, development and future patches. And not taking them from dev... means they have the same problem as now. Server hardware is on extreme backorder and won't be coming any time soon.

I kinda wonder if maybe they could have low population worlds hosted on AWS or Azure or one of those servers, temporarily, and eventually migrate them to hardware when it becomes available. I know they don't offer the performance of high end real hardware, but at this point it seems kind of any port in a storm...