Got my first card, a Mobil gas card, about 40 years ago, my first "real" credit card, an Amex green card, in 1984. Since then I have opened and closed anywhere between 200 and 250 cards. For a time I was churning Citi AA cards every 45 days, until AA shut everybody down. For now I am slowing down a bit, Covid has put a serious damper on my traveling.