Forum:Stardust Dragon/Assault Mode

I am very well aware that "Stardust Dragon/Assault Mode" is a quick effect monster that can be activated at any time, any where, and does not target. It can't negate counter traps because counter traps are spell speed 3, but one thing that I don't understand is why is it not able to negate continuous effects? The regular Stardust can negate continuous spells and trap cards like "Blaze Accelerator" or "Skull Lair."