I still mail lots of things. Some bills I pay online, some I don't. Some I have directly debited from my checking account, some I don't. I send birthday cards and Christmas cards and sympathy cards and my estimated taxes and a whole host of things.
I don't think it's any antiquated thing to still be using stamps and cash. No big bragging rights if you don't use them....Or if you do.
Why is it, when I have a 50/50 guess at something, I'm always 100% wrong?