I think part of what is going on here, is that the real movie junkies are watching movies at home, whereas the real book junkies still go to the library. So, both figures may be influenced by the most-frequent users, but in different directions.
I read a lot but switched to ebooks almost entirely 2 years ago
Reading a book a week from a major publisher usually costs more than a month from a digital streaming service. Borrowing books requires some planning ahead since much of what's worth reading has a wait list, assuming that it is even available to libraries. Contrast that to print titles. You may be stuck placing something on hold if you are looking for a particular title, but there is usually something worth reading available.
So that's somewhere between 4-20 dollars a month, and netflix spotify/netflix both are about 15 dollars. So some months my kindle will come out cheaper, sometimes more expensive.
But yeah, sometimes they are as expensive as print-book. Which is silly imo.
I go there to work or to read (sometimes on my kindle) because of how quiet it is.
I'm a cheapo, so I'm always looking for ebook deals. Waiting a couple months to buy a new expensive book I'm interested in (for free) is not a problem for me.
It's successor is the Libby app. It's fantastic. If you're not using the Libby app, you are missing out.
Also, libraries are used for a lot of things other than checking out books. Austin's library has boardgames available (I see people playing them there), and a lot of music and movie media.