How many /64s are you using at home?
I've heard a lot of opinions as to how large of an IA_PD allocation is appropriate for a residential service. There's some consensus that /56 is (or should be) the standard, but what I see in practice is either a sole /64 (ew) or a /60 if the prefix hint is sent for that. IMO I have a hard time imagining a home customer using more than 16 /64s of GUA, but maybe I'm not *that* much of a power user...?
For the record, I've got three /64s out of the /60 I get from Xfinity (Main, Guest, and IoT). I'm presuming that 99% of residential customers just use a single /64, however, much like they only use one RFC1918 block for everything in their home.
Is the guidance to hand out a /56 documented in any RFCs, or is that just operator consensus?
EDIT: Note I'm referring to GUAs that are part of a PD allocated by an upstream, not internal/ULA addressing. I've got plenty of those myself.