hah. try go hiking for couple days in mountains. no cellular, no charging, flaky gps, vhf/uhf radio don't work and your only hope is that you are prepared enough to survive getting out of there .
I don't even about sailing 100+nm off shore.
people assume every point of earth is somewhy equivalent to their porch.
Not entirely sure what point you're trying to make, so maybe this is not relevant to it, but, in 2026, satellite emergency support makes it seem irresponsible to not take your iPhone if you value your life or have other people in your life who would miss you if you were gone.