You are an exception. I hear people say “airline miles” and all kinds of junk. Cash works just fine for me. I don’t need some “points” or any such stuff, and I don’t pay interest.
Dave would say dump the cards.
Dave would say dump the cards for people who use the cards to live beyond their means and then get into debt problems. We’ve been using our cards for almost 100% of our purchases for 20 years, and have never carried a balance or paid a penny in charges. A simple question of discipline: don’t buy if you can’t afford.