I, personally, can't think of a time when I'd want to use something like {b'e' 'oH a'e'} or {yadda yadda yadda b'e' 'oHbogh 'a'e'}. 

I run into this all the time. I don't have any examples in mind, because I quickly forget about them as soon as I just reword whatever it is. But it definitely comes up.

-- 
SuStel
http://trimboli.name