> that being the case, i think it's "just plain wierd" that anybody is > arguing about the conceptual or architectural or complexity cost of SL > since the number of "address aware" programs is expected to remain quite > low in v6, perhaps lower as an overall share than in v4. and for those > few programs, LL scopes and SL issues will not be a noticeable share of > the overall cost or complexity of the program. the existence of scoped addresses in v6 forces a greater percentage of programs to be address aware. some programs that could avoid being address aware in ipv4 cannot do so in v6 and provide the same functionality.