I have a SPOT Gen3, like the size, never misses a report, most important is 2-minute tracking combined with my flight following, runs off aircraft power most of the time saving batteries. Low orbit Globestar means low power, smaller antenna, smaller batteries, lighter. Only needs to work where you fly, it worked fine in Tuk, 70N. $150/year unlimited use, and I use it year round.
I really would like an inReach for the two-way (hey, can somebody bring me a tire?) in the backcountry, but the cheap SOB in me can't make the numbers work over what I pay for the SPOT. If the SPOT was spotty, then maybe, but it has been ultra reliable. I can live without the two-way - nobody confirms they have received your 406 ELT, or your PLB either, and it makes no difference to you waiting for the SAR effort except for the thumb-sucking comfort.
But I just can't get 2-minute tracking year round out of an inReach for even double the cost, so we're comparing apples and oranges. More money always buys you more - you could go whole hog with something hardwired like the BlueSky or Skytrack we did with our helicopters and have two way satellite voice built in, along with the tracking and HUMS, for maybe 30K. There's no end to things in aviation to spend more money on to be "safer": helmets, BRS parachute, ADS-B, 406 ELT, life rafts, axe, flare pistol (sorry GCBC, had to throw that in

)