You would need more than one to do a rolling restart. Alternatively to do it with one instance of a software load balancer is a bit more work, spin another inst

You would need more than one to do a rolling restart. Alternatively to do it with one instance of a software load balancer is a bit more work, spin another instance up and update DNS. Wait for traffic to the old one to die as TTLs expire, then decommission. But I agree it isn't as easy as a in place upgrade.