Call answering practices change -very- slowly

I had a sudden insight on Friday that was a bit shocking and funny at the same time. During a discussion about online 'openess' someone explained that his daughter answers the phone by greeting the person calling, she knows who is calling her. I realized I always say my own name when I answer the phone.. but in a way it is ridiculous, because on my display I already see who is calling me! It is just a matter of habit. It's an old habit from the time when you could not see on the display who is calling you... There is my age-group playing out a small act as if we don't know who is calling.. It shows clearly that practices change very slowly following technical solutions. The way we interact and communicate with friends is grounded in a lot of conventions. If a persons picks up the phone saying her name, you know she is from the era before the displays!