Some of these "not human usable" complaints about typing/memorizing/pattern matching IPv6 addresses remind me of how long the distributed version control industry struggled with content-addressed storage and how "human usable" it was or was not. As the legends go Monotone spent years of engineering and lots of complicated code trying to build nice human usable sequence numbers in a distributed fashion, and then git just said "do the simple, stupid thing: show the (prefix of the) hash, people will adapt" and people did.
IPv6 doesn't seem "human usable" sometimes in large part because you aren't actually using it. People adapt. The human skills in pattern matching are robust: there are new tricks to learn, but there were always tricks to learn. (IPv4 addresses aren't "human usable" either if you sit down to truly assess absolutely how many RFCs are involved to build the patterns "everyone" has internalized that seem "easy". They are easy because they are familiar, because you use them often, because you've already adapted to them.)
IPv6 doesn't seem "human usable" sometimes in large part because you aren't actually using it. People adapt. The human skills in pattern matching are robust: there are new tricks to learn, but there were always tricks to learn. (IPv4 addresses aren't "human usable" either if you sit down to truly assess absolutely how many RFCs are involved to build the patterns "everyone" has internalized that seem "easy". They are easy because they are familiar, because you use them often, because you've already adapted to them.)