Regarding 64-bit being the standard - agreed - but 64-bit Windows at least allows the loading of 32-bit programs in the Program Files x86 directory - and I can't imagine them taking that out ever....but who knows.

Given that - one might think that if there are no performance hits running 32-bit software/programs on a 64 bit system (and I don't know if that's true my guess is yes) - unless there's a compelling reason e.g. performance improvement - why worry now or any time soon about the compatibility issue.