I used to carry a flat kit religiously for years. I think there is still one in my saddlebag, but the little tube is probably all dried up and I'm not sure the tire levers are there anymore. I have basically found that fixing flats on the go isn't worth my time, unless I'm out for a recreational ride in the middle of a nice summer day. However, I mostly ride to and from work, and patching or even replacing a tube would take a long enough time to make me late for work. And fixing a flat in winter....brrrr... let's not even think about that one!

My back-up is now either public transportation or a cab/Uber. Bike comes along for the ride or gets locked up for later pick up depending on which bike it is, where I'm going etc. So far I've only had to do this twice in about five years. Don't know why I'm getting so few flats now, considering how I once got three flats in four days. *shrug*