Both Kavita and Audiobookshelf require a particular folder structure. Since Kavita is comics first, the folder structure for ebooks isn’t quite as intuitive, and I didn’t care for it.

I had Audiobookshelf up and running well before I spun up Kavita, so I was already used to that folder structure, and since it’s designed around books anyway, to me it makes more sense.

Regardless, as long as you use the proper folder structure for the service you land on, you should be good to go.

The other reason I went with Audiobookshelf is that to me, it made much more sense to have all of my audiobooks and ebooks under the same service. (Albeit in different libraries)

I use kavita and tried audiobookshelf a bit after and all kavita requires is a specific folder of “Last, First” for authors and can toss any jpgs or epubs in those folders and that’s how I have mine structured. I didn’t have any structure setup before so adopting this one made sense to me.