Ummmmm
I thought we had been pretty clear.
There is no misunderstanding as to why or for what the space is being used.
There is just the complaint is that MS is advertising that you would have that 20GB of space for your live content and custom soundtracks, when in fact you will not have anywhere near that.
Also, I complain that it is not user configurable (I shouldn't have to devote space to emulation, if I have no plans on ever even using it).