I agree, it's the only way to remain truely compatible while freeing the OS from stone age technology.
The thing is: how many OS9.x software people are using with MacOSX now ?
And what do we want ? Being able to run transparently IBrowse which only handles tables, or FireFox in a new clean box ?
I don't get why people are so attached to running software from *stone*! Emulators/Sandboxes are there for that... There's no question of program that asks for memory protection... That's pure nonsense and loss of time...