On 20/09/2010 08:37, Frank Mittelbach wrote:
> Personally, I would think that it isn't needed at all. Instead I would suggest
> to either drop it totally so that with expl code ~ always needs to be used for
> entering spaces or provide

I'm with Frank on this. One clear set of switches (\ExplSyntaxOn/Off) is 
enough for me, and we avoid the possibility of more things 'falling 
through the gap'.
-- 
Joseph Wright