J. Clarke wrote:

Forget the cost of the mechanisms. Even if they trigger once a week
your insurer is certain to order you to upgrade as soon as the
insurance contract re-ups.

Do you have any incident to relate in which an insurer "ordered" a school
district to replace all of its non-sawstop saws?

Not yet, but my work is in the risk management field. It is close to
being a metaphysical certainty that the insurers will do this as soon
as they realize that there is an option.

The cost of replacing a table saw with a saw stop is trivial, $3500 is
nothing compared to the cost of a negligence lawsuit. The risk of
injury is clearly very high, the cost of the injury anywhere up to a
million dollars or so (kid loses hand).

If you want to make something happen fast there are two ways to do it,
either you make it an audit requirement or you make it an insurance
requirement.