Re: 0 SET-ORDER why?

One should not forget that the linear search-order concept has
a long history (CONTEXT et al) and has served mostly well for
many small Forth applications. So be gracious towards some
ambiguities.
More modern languages with a wider application spectrum need
more elaborated namespace management. Should anyone invest brain
and time into a novel Forth namespace management concept, search
trees (instead of today's global search-order list) would be a
good place to start with.
This would facilitate early binding, modules, public/private
library handling etc. Of course these things are not new and
already there, but without common basis - and so everyone is
cooking their own soup.