The point is a P3 1Ghz or early P4 PC is worthless today but usable, an old 68k or pre g4 PPC is just useless. There are plenty of usable but discarded 5 year old computers out there that giving somebody a 10+ year old unsupported relic is not a good idea. it is getting to the point where you can get a new system for a few hundred with a warrenty.

I think educational software in general is crap and has always been that way.