Credit scores can only affect your life if you live on credit. I spent 20 years without a credit card, and the only impact was being a hassle to rent a car. but as far as cars go, I do the unthinkable: I save and buy with cash. I simply do not use credit. Beyond my house payment, I purchase everything up front, including the nice and hefty discount when paying insurance in full for the year. It is a pain in the ass to get used to not using credit, but it is so, so worth it.