In the US in the state of Wisconsin has a statewide digital library last time I was a resident there. That means all libraries share the digital library across the state. My experience was a incredible variety of content at the cost of somewhat longer wait times.
The same cannot be said of Minnesota. When inquiring why Minnesota does not have the same system when chatting with our local library it came down to publishers were no longer willing to have such an agreements. The library would love to have such a system in Minnesota but the publishers are against it. I wish there was a way we could bridge readers with their authors.
As a side note I don't quite understand the downside even with the Wisconsin system. For my understanding it was contracted per book for a length of time and also a fee per read.