Starting with the more specific principle, moving functionality from "the
network" to "the user entities" is not at all necessarily the Wrong
Thing. Sometimes it's very much the Right Thing.
however, when that functionality requires having knowledge that is only possessed by the network (which is what hosts need to do address selection), moving that functionality all the way to hosts is probably the Wrong Thing. especially when you realize that a lot of the value added by IPv6 is the ability to have large numbers of relatively stupid hosts (like sensors).
(you might make an argument for moving the functionality to the edge of the network, but not all the way to hosts, and that argument might be convincing)
Keith
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