[fulafel]

RFC 7368 is a 2014 "informational" (no ietf standing) doc so it's not a source for current IETF advice. Also it was part of the since closed "homenet" working group initiative trying to define some new stuff that did not get vendor uptake.

But in substance, if you have several subnets, then using ULA may make sense depending on what you're trying to do. However most home networks don't subnet.