[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.