I see this point a lot but it never really made sense to me. What exactly does IPv6 bring to the table that makes it unnecessary to remember IP addresses? Especially for anything more advanced than just looking up a hostname.
If I wanted to memorize the addresses for some reason (maybe I broke DNS or something?), I'd just start numbering devices at 1 and keep going up.
I break my DNS very often, or at least, often enough that it'd become nuisance that I can't instantly recall IP address of every machine in any of my 5 VLANs, AND type it in manually within 3 seconds.
With IPv6, I'd have to drop whatever I'm doing and fix my DNS first.
It'll be even easier because you can use numbers greater than 254 for your local devices, or l33t-style hex addresses, without setting up routed subnets when you exceed your /24 like on IPv4.