I still have my very first bank account. It was opened the day after I was born. I've moved most of my money out of it, but I keep it around as source of backup emergency funds. And I had to use it once, to cover a check that I had written from the wrong account and needed to get funds to it immediately. I withdrew several thousand dollars in cash (not trusting them to credit the deposit instantly), ran them across town, and deposited them.