I've listened to a lot of audiobooks over the last several years. I've switched probably 80% of my "reading" time to audio so I can get more content (while driving, cleaning, laundry, etc.).
In my case, retention is much lower for listened content compared to read content. So much so that I now only listen to things which I consider entertainment. For anything technical, or that I'd want to retain longer than a few weeks I read with an actual book.
I hesitate to speak for everyone on this, but I will say that a few friends I've spoken to about it have said they see the same lesser retention in audio content.
In my case, retention is much lower for listened content compared to read content. So much so that I now only listen to things which I consider entertainment. For anything technical, or that I'd want to retain longer than a few weeks I read with an actual book.
I hesitate to speak for everyone on this, but I will say that a few friends I've spoken to about it have said they see the same lesser retention in audio content.