Reader Demotrash, who by all appearances must be visiting us anonymously from Harvard, says this:

These are important observations that explain why I don’t like the growing popularity of the term oral culture to describe what we are experiencing.
Oral culture exists in a deeply religious society. There is a core of shared belief that brings people into the same symbolic universe. Without this shared worldview nourished by a lifelong participation in the common rituals and traditions, there is no culture. If you don’t have a shared symbolic language that everybody understands irrespective of their degree of literacy, there’s no culture.
There is another aspect to this issue. Culture is the capacity to understand that something can mean something else. It’s a non-literal understanding of the world of which only humans are capable. Portable screens are creating a cognitive gap of extraordinary dimensions. All of the natural cognitive distinctions remain in place. On top of it, we are adding a large number of people with a flat, one-dimensional inner world who can’t comprehend the reality around them and will exist in a state of a permanent freakout over it. They are imitating culture’s “something can mean something else” but in a flailing, dumb way. Like parrots who imitate the sound of a human voice, they chant “people in maroon shirts must mean something”.