My memory tells me it was both. With libraries closed they were not able to provide adequate access to those with disabilities.
https://www.overdrive.com/explore
If you search for Charles Ross' Edward IV (https://archive.org/details/edwardiv00ross), you find:
https://www.overdrive.com/media/3099728/edward-iv
which lets you find if your library has a copy or to find a library that does. It's a trick. "There are no libraries with this title available that match your search criteria [my search criteria was 'all libraries']."
How about Sailors and Scholars: The centennial history of the U.S. Naval War College (https://archive.org/details/sailorsscholarsc00hatt)? It's not available from OverDrive. But then it's been donated to the IA and is freely available. But I'll bet the publishers want it deleted anyway.
Or Introduction to Information Retrieval? I would advise trying to borrow it as it's probably very out of date, but still kind of interesting. OverDrive lists it (https://www.overdrive.com/media/179471/introduction-to-infor...), but no libraries have it. Neither does the IA. Maybe I should scan and donate my copy.