I keep a credit card in my wallet but rarely ever use it. I am 35 now and have had a house with my wife for almost ten years now.
When I was late teens to early twenties I had racked up almost $10,000 in credit card debt. Just buying stupid crap and partying and just being dumb.
My wife and I each carry a credit card but only use our debit. Sometimes their may be a parking garage that only takes credit card or a hotel rental or something like that.
To be honest I can see that if you are smart and pay off your debts on time, that using the rewards programs are very smart. I just don’t want to get down that rabbit hole again.