Originally Posted by lesli_felix
Director crashes the browser quite a bit more. I wouldn't want functionality that compromises stability, and flash is actually very stable compared to nearly all other plugins.
Relying on graphical accelleration would also result in vastly different performance on different machines, even more so than flash has currently.
Also, plugin size is still an issue, good player penetration results from keeping it as small as possible.
Don't get me wrong, 3d accelleration would be great, and the hardware support would make 2d graphics much faster as well, but I don't think Adboe would hold out on this unless they had good reason to.