[jeremy7600]

>For example, you don't need to be fully engaged to consume audio in the same way you need to be to consume text or video (i.e. it's easy to vacuum your house or drive a car while listening to a podcast. Not so easy while reading a book or watching a movie).

As a personal anecdote, I DO need to be fully engaged to consume audio in the same way as text or video. Your example of vacuuming is a perfect example, while trying to pay attention to the carpet I'd stop paying attention to the podcast, and i'd have to rewind, which I find tedious.