Why are these things still around?

Here's a list of things that should not exist but still do:

• Pagers - this is self-explanatory.
• Blockbuster - between Netflix, $1 kiosks, and Wal Mart bargain bins, there's really no good reason to rent movies from Blockbuster in my opinion.
• Phonebook - two places I have seen phonebooks recently: sitting outside of apartments, in dumpsters.