There are many people who can't focus while reading, audio books are for sure one of the solutions. My favorite way of content consuming is still reading physical book. However most of the time, I would say 90% of content I'm reading is in digital format, but physical book for me is irreplaceable as experience.

I'm also finding harder to focus with audio books I guess it has to do with speed by which content is consumed. Audio books are narrated with constant speed and if boring part comes along my brain goes to different track. With physical books I can choose reading speed and adjust focus as needed.