If they were archiving digital versions so they could be read by thousands in the future, this would be a totally different conversation.
They don't even need to be as selfless as the internet archive - just follow Googles lead and allow people to search and view selections the archive, with automatic opening of the archive when you are confident copyright is expired. Even a closed archive owned by a third party with a dead mans switch to open it in the future when the business model is done would be something.