Personally, I prefer the paper phone book.  It does not matter how refined my search for a number is online, I always end up with 1,000 options, all of which are businesses located in the USA.  That is not helpful at all especially when I am looking for the number of a vet 10Km down the road, or a Home Depot 15 minutes away!
Consider too that many seniors rely heavily on the paper phone book.  Many of these people do not have a computer, smart phone, I-pad etc., and even if they did, they cannot figure them out.  
This is the problem with 'movements' such as going green... they only move in one direction without consideration for the equal and opposite reaction.  Look no further than JT to see this in full swing...