In Germany, they didn't distribute phone books to every house - they left large piles at the supermarkets and town halls so that if you wanted a copy, you could collect one. Very sensible, given how few people must still use them.
Personally, I do still use them but not for looking up phone numbers - they are extremely useful for propping up a baby cot for example, when your baby has a cold, just slip a phone book under the feet at the top and the job's a good 'un! Or if you need a heavy book to straighten out a crumpled piece of paper....