Bosch makes a REAXX saw stop type system that doesn't destroy the blade,
but just pulls it instantly below the table surface. The activator
cartridge is good for two actions, in case the user didn't learn
anything the first time, and it just takes a couple of minutes to reset
it. I don't know. It seems to me that it ought to at least have an
internet connection that automatically notifies the user's insurance
company so he'd still have some reason to be afraid of a table saw, and
some incentive to pay attention.
Ron N