alt Hacker NewsNot a counter-point, but: the other day I rebuilt my personal server, finishing by pointing the reserved IP at the new box. I then had a period of confusion because I was still seeing old content, because my browser (etc) was obviously querying the AAA record first, which I hadn't updated.
(a while ago I needed to contact support to get an IPv6 allocation at home, but that was a very quick interaction at the time)
Browsers add an additional layer of fun where they can cache an IP address long past the TTL as long as the old IP keeps responding correctly.