Two flats so far.
Once coming back from work like 2 years ago, the rear tire stepped over some rock or something and had a bit side wall damage - booted the side wall and still riding on it today, with some 3k miles after the incident.
Second is not a flat, but a defective valve tube connection. I did clean up, pressure tire, lube chain for next day ride. In the morning after taking from garage and rolling the bike ... hunmm??? something is not right. Front tire was way low pressure. Swapped the front wheel with another one and went out. At night, disassembled it and didn't find any whole, but some noise coming out from the valve area. It was some cheap tube I put on cart to get free shipping somewhere....