if I were 20 and still had a cell phone with all my friends from 4 years ago I think that's the key here. Smart phones which you use like a database. If you h

if I were 20 and still had a cell phone with all my friends from 4 years ago I think that's the key here. Smart phones which you use like a database. If you had that when you were 20, you might have hundreds of contacts in your smart phone today. People rarely change both emails and phone numbers at the same time.