I have started cold calling some of my friends over the last year or so, and it's always great. I will sometimes talk for over an hour with a friend I haven't spoken with in a few months+. A normal phone call has kind of become a novel thing, at least in my generation (Z) and the general absurdity of it makes it even more fun.
I agree very strongly with what the author mentions about how we strive for hyperconnectivity with our smart phones, and I have made a goal for myself to abandon mine by the end of the year. I haven't fully decided if I'm going to carry around a dumb phone or not, but I am probably going to not carry any phone for at least some time.
I have also started texting and calling with JMP Chat, which bridges to XMPP, so you can easily use any computer for all my communication.