[Mingw-msys] Why map root to both / and /usr?

[Max T. W. <max...@ve...>]

I scanned the entire subject list (some 900+ entries) and did not see a subject 
line that asked this question...

I understand that /bin is special because executables in there link to the msys*.dll.
I also understand that this will change with 1.0.11.  I've also seen the /mingw
tree, the /mingw/mingw tree and the /mingw/mingw32 tree and each has a ./bin
directory.  That's a lot of different places an executable can end up, and after
installing several tar-balls, I've found that the same executable (diff -q says
nothing so, unless I'm misunderstand what diff does, they are the same) in more
than one.  This strikes me as wasteful and confusing.

It seems to me that if /usr and / did not map to the same directory, all the
stuff in the mingw* trees would properly go into the /usr tree.  The result would 
be much more like *NIX and much less confusing.