[vel0city]

Home users would ideally be served by things like mDNS and LLMNR, which should just work in the background. If I want to connect to the thermostat I should be able to just go to http://honeywell-thermostat and have it work. If I want to connect to the printer it should just be ipp://brother and I shouldn't even need to have a DNS server.

[M95D]

And if DNS fails, I have to use a serial console to get into my router and fix it, because I can't remember what address to type in ssh?

[vel0city]

Your interface has a default gateway configured for it, doesn't it? Isn't that default gateway the router? NDP should show the local routers through router advertisements. There is also LLDP to help find such devices. LLMNR/mDNS provides DNS services even without a centralized nameserver (hence the whole "I shouldn't even need to have a DNS server"). So much out there other than just memorizing numbers. I've been working with IPv6 for nearly 20 years and I've never had an issue of "what was the IP address of the local router", because there's so many ways to find devices.

Even then nobody is stopping you from giving them memorable IP addresses. Giving your local router a link-local address of fe80::1 is perfectly valid. Or if you're needing larger networking than just link-local and have memorable addresses use ULAs and have the router on network one be fd00:1::1, the router on network two be fd00:2::1, the router on network three be fd00:3::1, etc. Is fe80::1 or fd00:1::1 really that much harder to memorize than 192.168.0.1 or 192.168.1.1 or 10.0.0.1, if you're really super gung-ho about memorizing numbers?

[M95D]

> Giving your local router a link-local address of fe80::1 is perfectly valid.

You're right. That would work.