Some people want to run the best version of Mac OS 9.2, for most uses, and that happens to be in 10.2. Why do you think there's so much activity about it compared to 10.3?
Of course, if you need direct hardware access, that's a whole different matter, but the only way to properly run the original Escape Velocity outside of 9.2 is to run it in 10.2. On 10.4, it's a slideshow. It's a 68k app, designed for a world of 70 mhz 68020 chips, or thereabouts. it shouldn't be a slideshow on a 700mhz G4 eMac, and it's not when running directly in OS 9, either. But 9 hates my kvm switch, while 10 has no problems with it.
Beyond that, we're getting into "why bother with ppc hardware at all?" territory. And, I mean, there's not so many great ways to run OS 9 apps that use a gpu, or a ppc mmu, for that matter. Yes, we have QEMU, but it's such a mess trying to get sound out of it, and just setting the thing up is a headache.
And I mean, if you're going to use a ppc Mac at all, why not try to do it all?