The cost/risk analysis is certainly weighed heavily in the favor of prevention by the high cost of a single incident...
My thought is if I were buying for a commercial shop and certainly if I either were going to have employee(s) or others besides myself using it I'd consider it almost a given.
For home shop it gets more subjective -- usage typically is way down, time pressure of production, etc., are generally far less, etc., so risks _should_ be lower. OTOH, there's the possibility of less experience/familiarity, may be more likely rather than less to make a poor choice of operation or how to most safely perform a given operation, so risk _might_ be as high or even higher...
All in all, if have the budget, from what I've seen of the saw at a single show and from reviews, seems hard to say you could go wrong with going that way. The only negative I've ever heard (other than the diatribe kind of stuff) was one reviewer a couple of years ago commented that his test machine turned off on its own a couple of times while using it--not a hard-stop false firing, simply the on/off switch dropped out. One would presume this was either an isolated faulty switch or the problem has been resolved by SawStop by now--I've certainly heard no more about it.
IMO, $0.02, ymmv, etc., etc., ...
- dpb