The only real struggle is reliance...how much you allow yourself to rely on your various devices to survive your days. Lots of room on that spectrum for varying investments. I'm personally not reliant on my iPhone for things I couldn't live without...I recently took a week away with some friends to the mountains where we took our phones, tablets and computers, locked them in a safe and left them at home. 5 days with no electronic connection (aside from some football on TV that Saturday), and I must admit, it was refreshing...no obsessive Facebook status checking, no capturing of every slightly photogenic nature scene, no GPS, no communication outside of actually speaking to someone.
I felt awesome that week. I felt like if the time came and these items were rendered useless by some event...life would go on for me without much of a hiccup. I'd probably be more pissed I couldn't enjoy my expansive music collection as easily vs. other things...followed by the easy access to snap photo memories of life as it happens. Both things I grew up without, so I think it helps me accept the idea that it could return to that again.
Others, like my wife, would probably have a total and complete meltdown physically and mentally. Her connection to her iPhone flirts with insanity, but she relies on it for a lot more than I do, and I guess I can understand when you reach that level, just like a drug, it's something tough to think about breaking from if you had to. I guess for people like her, we probably won't ever have to.
I like getting off the grid from time to time. I'd recommend it to anyone.