Someone needs to take up Carnegie's mantle and finish the job which he began.
What's the limiting principle you propose? It has to be something real libraries and library funding sources can take action on, because they have to take real-world actions on them. So this is not a time for aspirational speeches or vague exhortations to "do more", which is the exact opposite of a limiting principle anyhow. What is "enough"?
As I noted, it's a pain for me to have to drive down to DC to get access to a book which _used_ to be in the local library system, but isn't anymore, or to purchase my own copy (which wasn't previously necessary).
My current library is around 2000 square feet and I acquire around 1000 books a year, so I have to toss around 1000 books a year, because they're made of matter and take up space.
https://www.abebooks.com/servlet/SearchResults?ref_=search_f...