That video was great! Couldn’t stop laughing. Personally I carry both. I always have a mini Moleskine Volant in my back pocket and I have my smartphone. I usually have my shopping list in the Volant, but now that I have the wife on a smartphone I might try a few apps that can sync between us. There are a lot of times though that a notebook is easier.
Like you, I carry both. There are some things you just can’t do well with a smartphone. The notebooks are indispensable for drawing sketching and allow me greater freedom in how I want to organize my life. The alarm on the smartphone are nice if you tend to forget to check your planner for important appointments.