Comment by nottorp
And we're getting back to that old problem. Why isn't the link-local IPv6 address automatically fe80::10 if the IPv4 is 192.168.1.10? :)
And we're getting back to that old problem. Why isn't the link-local IPv6 address automatically fe80::10 if the IPv4 is 192.168.1.10? :)
Don't forget that IPv4's link local addresses (169.254.0.0/16) are also randomized for the same reason: making link-local addresses use sequential numbers by default requires a centralized node to coordinate them, which is counteractive because link-local address are designed to not require one.
IPv6's answer to IPv4 private addresses (e.g. 192.168.0.0/16) is ULA (fd00::/16). Newer routers are beginning to assign local hosts with ULA addresses, thus if you want to have a stable address to a local device, you can simply connect to it by ULA.