It may be useful to note, for whoever is reading this, that low DNS TTL only ever makes sense for anything that you can do a cutover either automatically or on

It may be useful to note, for whoever is reading this, that low DNS TTL only ever makes sense for anything that you can do a cutover either automatically or on short notice, not for all records. Otherwise, you are now at mercy of outages on your DNS providers. Just leaving it out there so one doesn't get the idea that "low TTL == Always Good"