Forgive my ignorance, but isn't it normal to cache the DNS for 24 hours or so by default? I think it's typical (though I've never done it, so I'll apologize aga

Forgive my ignorance, but isn't it normal to cache the DNS for 24 hours or so by default? I think it's typical (though I've never done it, so I'll apologize again if I'm talking out of my ass here) to drop the TTL down to basically nothing well ahead of the migration so that when you flip the switch, everyone will notice almost immediately, and then you can push the TTL back up to normal on the updated record.