My lasers are capable of 15,000 mm/minute.
It would be nice to have the option to speed up the laser rather than dim it.
I think jobs would get done much faster and you would have much more depth than 255 grayscale.

So,, you would choose your min speed (Darkest) and max speed (Lightest) and then choose linear or logarithmic speeds.

This would also mean you don't need PWM to run grayscale.