If you never used Cover Flow, bully for you, but some of us out here DO use it--A LOT. Maybe you didn't understand that it was simply album list view---turned sideways. Seriously.
It helps to be able to tap some pictures if you've forgotten the exact data (album, song) or are looking for a lot of works with the same data (date added/modified, Comments, etc). You can tap on the arrow to scroll from album to album quickly, until you find what you're looking for in the list below. There have also been a lot of times when what I was looking for was on an unknown single-disk album by a certain search criteria, and I didn't have to scroll through all the tracks of a multi-disk album to get through the list. The album list view didn't make it as easy to get to and see as much of the track data that I needed to look at as Cover Flow does.
Finally, it's awesome for someone like my 73 year old mother, who wants to listen to some music while she's waiting for me to make her breakfast and tells me there was this jazz song she liked that I've played before; however, she can't remember much about title or artist, and she isn't very competent at computer anything. She has a good memory for visual images, though, so if she can see a big enough picture of the cover, she can find what she's look for, really quickly. Album list was confusing to her for some reason, but with Cover Flow, she can flip through the images, and then she can look at the list below to find her song. It's almost like looking through a crate of LPs, and she understans that, perfectly well. All I have to do is run a search for 'jazz' or 'Mom Songs', and she can take it from there.
So there are some good uses of cover flow out there, if you knew what to use it for. Or have someone living with you who struggles with computers.