Show me the last time Apple gave a damn about a customer who has a previous product and wants to use it with a current one.
Remember the PowerPC Snow Leopard beta?
Oh, wait...
We're at a transitionary period of forced obsolescence. It'll pass.
Uh...Apple supported PowerPC for almost two full OS versions after they switched to Intel. The only way the Snow Leopard comparison makes sense is if Apple had switched to Intel at the same time as they released of Tiger (instead of a few months later) and immediately dropped PowerPC support.
They didn't. When SL finally gets released this year, it will have been more than three years since the last PowerPC Mac was sold as new.