There are so many reason we should be able to mix media in our collections. First, there are universes, Star Wars for example, that connect comics and books. It would be nice to be able to keep all of that in one place instead of having it in two locations…or several locations. Which brings me to my next point
The fact that some collected editions of comics are labeled as “Books” so you can’t put them with your other comics is a bummer. If I do have to separate books and comics, I don’t want to have random comic books in my book list. And if I don’t want to do that my only other option would be to create a new collection. I dont want more than one collection for things that should all go together, so I definitely don’t want more than two collections.
I know that most of the time you can find the individual issue or series and add them to your comic collection that way, but it’s happened to me several times where I just can’t find the issue or series that I’m looking for.
So yeah, if we can’t mix comics and books (or comic books disguised as books) then there should at least be an option to reclassify it as a comic for your list.