I did not know this , as I said I came across the sawstop while reviewing saw tables in general several years ago , of course I was aware of kick back but that was about it . Had no intentions of getting my hand anywhere near the blade but I thought just in case it would be worth the extra cost . I even factored in a new blade and cartridge but alas it was not to be .someone earlier said that the uk is ahead of the game when it comes to machinery safety but usa had the sawstop ahead of us . Given those statistics on injuries I guess they need it more but it should be available to all as said by many - to be used in conjunction with safe working practices and environments not instead of . There will always be the risk of children entering the workshop when your back is turned , or even adults with learning difficulties or that minority of people who are just curious or plain nosey that can wander in turn a switch on without thought of what it’s connected to . A few have used the safety features in cars to make their point which is fair enough tbh but all the safety features in the world won’t help you if you drive at 100+ mph head on into another car . They are there to limit the likelihood of serious injury or death when the vehicle is driven responsibly . Anyone pick up the story of the manager jailed for 7 years because he sent his employee into a industrial shredder to work on it and the machine was subsequently turned on - game over for the unfortunate employee. If a type of saw stop technology was fitted to that machine he may well have been badly injured but would he still be alive .. We all need safety devices even if we feel we don’t need them it a case of WHAT IF .. with the potential for driverless cars and lorries in the near future perhaps we all need to be prepared for a WHAT IF scenario ..The inventor went to all the machine makers in the US when he came up with the device. They didn't want anything to do with it because among other things, it would require spending money on new tooling to make, felt it would make them liable if someone got hurt with older saws without the device and were not required to so why bother. Then he set up his own company and started to sell them himself. Defended his patents when Bosch tried to make a saw similar to his only after they were successfully sued by a man that cut off some fingers. There is more but that is some of it.
Pete