Voice synthesis AI has gotten pretty impressive: https://www.audiostory.ai/2065785/12139903-a-fragment-from-t...
I listen to a lot of audiobooks and have definitely sampled some with narrators I found harder to listen to than that.
That said, there’s a sort of droning evenness to the voice that makes me unsure I’d want to listen to an entire book’s worth, and the voice reading Gatsby is way better than the voice reading Alice in Wonderland, which I definitely couldn’t listen through.