I have a slight bit of geocaching experience from circa 2003 or so, and have memories of interesting places it led us to. Last week while my car was in the shop, I suddenly realized my smartphone might suffice for a bit of local geocaching, so I tried it and had a good time. So then I dug up the little yellow eTrex handheld GPS I still have from a decade back, loaded batteries, fired it up. Not too impressive.
With a smartphone (G3 in my case), I simply turn it on, tap up C:geo, and I'm in the game. But with the GPS, I first must remember to bring it, then after powering it on must wait five minutes for it to find its bearings (seems to take forever to acquire the satellites), and then must load, or have loaded, the coordinates as waypoints, and then make sure the sky above is unobstructed, and then ... well, you get the idea. Smartphone seems a no-brainer, why would anyone want to use a GPS and futz with one tedious detail after another?
In town, I mean. I can see where the GPS might be preferable in less urban environs where cell towers don't sprout like weeds. Please also note that my experience with GPS devices is actually limited to this one unit, as described above. No, seriously, I have never used any other. Is it possible I have a seriously ancient unit that's best put out to pasture?