I can read 3-4 times faster when doing so by myself with a physical or kindle copy of a book.

However, what I do love about audiobooks is I can listen to them at times when reading would be impossible. For instance, I can listen while exercising, walking the dog, preparing dinner, doing the dishes, vacuuming or doing the laundry.

Because I listen to audiobooks I can get through about 110 books a year. Without audiobooks, it would probably be somewhere between 80-95 books a year.