The more I think about this, the more concerned I am about changing the number of elements in the tuple. That's the change that broke platform.py. Maybe we should add a parameter named something like "level", defaulting to 0.

0 = existing behavior, but with named tuple
1 = return named 9-tuple OSVERSIONINFOEX values
other values: reserved for future use

Or maybe we should make it a bool instead, and not worry about future expansion.