[mark_h]

Not 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)

[Dylan16807]

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.