Yeah, the GPS I use more than others is a Garmin Nuvi, not for the navigation so much as the ETA and traffic routing. I know point A and point B and the roads between, but traffic is fluid and a few times through Los Angeles taught me to believe the GPS when it comes to routing. On a busy I-5/I-405/I-10 day, the Nuvi routed me SE across LA on roads I'd've never chosen to pick up I-15 and all was good. Survival? Nope, convenience.

GPS nav has its negatives, one being folks becoming too reliant on the tech and not being able to function without it. I s'pose that's true of most tech...

As for hiking in the backcountry or large parks, the 10 Essentials are still essential.