IPv6 address don't have to be long or publicly routable. ULA addresses (fd00::/8) are the IPv6 analogue to RFC1918 and you could theoretically use ULA addresse

IPv6 address don't have to be long or publicly routable. ULA addresses (fd00::/8) are the IPv6 analogue to RFC1918 and you could theoretically use ULA addresses as short as fd00::1, fd00::2, fd00::3, and so on. Of course if you do this you run the risk of colliding with other people, so you're encouraged to randomly generate the next 40 bits after fd, which leaves you with addresses like fd32:5e26:381d::1. That's longer than IPv4 addresses, but it's a pretty fair tradeoff to get a globally unique address. Even non-ULA IPv6 addresses need not be long. 2600:3c00:e000:6c::1 is the address of my server over at Linode, and I don't find that bad at all.