There is some truth to it, because they only work well if used directly (either hard coded IPs or DNS).

This problem seems to be addressed already and might be solved in the future: https://datatracker.ietf.org/doc/draft-ietf-6man-rfc6724-upd...

(once again it's surprising how long it takes to clear up all IPv6 quirks)

> ULA are useless for most practical purposes because of the source address selection rules.

/me glances over at my LAN which has been happily using ULAs for local communications and GUAs for global for the past I don't even know how long.

_Sure_.