Are they life saving features or do they just appear to be such? I'm wary of the actual math on these things. I think it's an honest attempt either way, but a

Are they life saving features or do they just appear to be such? I'm wary of the actual math on these things. I think it's an honest attempt either way, but aside from a few anecdotes of 'it working as intended' I really do wonder if the math works out on this stuff i.e. cost/benefit is really there. Without seeming too apathetic, if 2 or 3 people are able to make life saving calls due to this every year because they were 'out in the wilderness' ... then it may not be worth a massive global technical deployment. It might be more rational for people to buy/rent proper off-trail gear, or, for cars to have these things built in or something along those lines - where the cost efficiencies are much greater.