> I don't really agree. A lot of applications don't actually improve going up to > 64-bit. There's also no real cost for running 32-bit apps on a 64-bit architecture. > 32-bit should be supported under 64-bit OSes for the near future, up until about the > point where API compatibility with those older apps fades out.
You actually are agreeing: the discussion is "people should use 64 bit OSes", not "people should stop using 32 bit apps". (Although in the case of MAME it's dumb to run a 32-bit version on a 64-bit OS).