DNS is never consistent, that is an explicit non-goal. You can also get a CNAME from last week pointing to a CNAME from 5 minutes ago pointing to a nonexistent

DNS is never consistent, that is an explicit non-goal. You can also get a CNAME from last week pointing to a CNAME from 5 minutes ago pointing to a nonexistent hostname in a nonexistent zone. This feels very much like hammering on DNS to make it look like a bad copy of etcd or something. Also, http(s) within SVCB is an ugly special case to be handled differently than other SVCB records. And one SVCB answer doesn't contain all you need. E.g. there is no intent to be a replacement to or consistent with TLSA entries, so you will still need to do mutiple queries. It just contains the ECH key, so it rather looks like a half-baked kludge to make ECH work somehow.