I could, and have gone for weeks without "devices". But that was typically either as a hut warden in the mountains, where I'd meet new people every day, or on long hikes, ditto plus see new landscapes all the time. I'd get bored and lonely after a week or so in one place with just my closest family around. I love them dearly, but I'm accustomed to and prefer daily contact with more people than that. It has little to do with devices really, more to do with where I live and where my friends are.

If all phones and all computers disappeared off the face of the earth in one fell swoop I'd adapt quite happily. But if I lose my cellphone I panic a little, because I know lots of people rely on getting hold of me that way.