"A. Why can't the library just buy as many digital copies as are needed for the customers, and keep them forever, if they don't naturally degrade?" My local li

"A. Why can't the library just buy as many digital copies as are needed for the customers, and keep them forever, if they don't naturally degrade?" My local library offers assorted e-books. Every so often, when I've tried to request one, I was told I had to wait until someone else "returned" their copy.