Length of credit history: Older is always better As you've pointed out, a good portion of those 35 points could have been lost due to your average credit age falling from an already - low four years to a mere two years. (speakingofcredit.com)
I have one simply because I don't ever plan to close my checking account and over time it will help keep my average credit age higher — should I ever need to apply for new credit. (money.stackexchange.com)