Cornbinder isn't alone in not having a smart phone. I've never owned any sort of mobile phone, and have never wanted to. I also don't participate in social media, except for two auto-related forums (here and FitFreak.com), which are sort of like social media's weird but kind-hearted cousin from the Ozarks.
Being full of contradictions, I also own a Leaf and use a computer all day for work and for the Internet. The difference is, when I want to be done with the computer I turn it off and leave the room. Few folks do that with their phone.
My early experience with mobile phones, based on observing my siblings who got them in high school, was that everyone (including your mother!) expected you to be available 24 hrs per day, if not for phone calls then at least for texts (another fun fact, I've never texted!). It was evident to me pretty early on that mobile phones (and social media) are engineered to commandeer our attention, and I think observing the typical behavior of people in public (crooked necks, peering into phone screens and oblivious to the world around them) shows how successful they have been. More than a few people in my personal orbit have dramatically reduced attention spans and are mostly incapable of spending more than a minute or two doing nothing without having to grab at their phones.
Reminds me of how my mom used to frantically grab for her pack(s) of cigarettes every 30 minutes when I was a kid.
Before you ask, it is indeed becoming increasingly difficult to exist in the modern world without a mobile phone, especially with regard to banking, making appointments, etc., but I am incredibly stubborn and will avoid it as long as possible. Maybe I'll get gravestone carved to look like an iPhone and it can say "They finally got him!"