[keiyakins]

Even? /60 should be the minimum, even home users usually have a couple subnets (guest networks for example, sometimes one for the router's WAN link) and you want the boundary to be on a nybble boundary

[rekoil]

A /60 network consists of 295,147,905,179,352,825,856 addresses. I think most users will probably be fine with that.

[Dagger2]

This is v6; nobody counts individual IPs, because the answer is always "enough".

A /60 is only 16 /64s (i.e. 16 subnets), and that's not always enough.

[keiyakins]

Yeah, it's not always, but for most home networks it probably is. Ideally they'd give you a /56 or even a /48, but giving those on request and a /60 by default is fine.

[rekoil]

Wait, can you not subnet IPv6 smaller than /64?

[keiyakins]

Not if you want SLAAC to work, no.