4 ms·I'm thinking shelves are way more efficient take up less space, no repair or electricity needed.by DoesntMatter22 2y agoI'm thinking shelves are way more efficient take up less space, no repair or electricity needed.fgonzag 2y agoThese machines could enable an automated check out process that is open 24/7ratg13 2y agoSomeone has to maintain them, and that is beyond the scope of most librarians. The fees to run a company just to maintain these machines all over the country would make them cost prohibitive.