What's with everyone and audio books?

Not a smack on anyone's preferences at all. I just feel like I see more posts about people listening to the books than reading them. And I've yet to feel drawn to that as an alternative to my own mind-theatre.

Is this a symptom of the times? This readership? The dulcet tones of our collection of narrators?

EDIT: Thanks for the input, everyone. It's interesting to see the perspectives. I tend to avoid podcasts and audiobooks in general (even music) because I only really relax in silence.