The Saw Stop system has been around for years, but has nearly zero market acceptance for the following reasons:

- It's very expensive to purchase compared to a similar saw without the feature.

- It's prone to false activation, particularly in damp wood. Every time that happens, it destroys the saw blade and the braking mechanism, with a cost of hundreds of dollars to replace them.

- Common-sense safety practices eliminate the need for it. To a large degree, it's "a solution in search of a problem". Yeah, I know, people do get hurt on table saws, but in virtually every case, it's because they've ignore established safety practices. The Saw Stop seems like a case of "if you feel you need it, you probably do, since you apparently can't trust yourself to be careful".

While I can see why a school might feel compelled to use them for liability reasons, I'm not surprised that none of the other saw manufacturers have licensed the system. I wouldn't buy it.