For general business use, what situation would demand upgrading a 733 Mhz processor? For what purposes would OS9 *not* suffice?

Well if that's the case then the manufacturers of these things (and those who sell software for them) need to start sneaking in some planned obsolescence to protect their revenue streams. Nobody likes to release a product that lasts forever... Well, except our beloved empeg guys.

Seriously though, I think that Microsoft et. al release bloated code on purpose so they can help sell more new PC's with faster processors, which will be bundled with new versions of the O/S, which will be obsoleted by new versions of bloated code, which will sell more PC's, which will be bundled with the newer O/S, which will be obsoleted by....