Last April when you couldn’t find a tube for love nor money, I did a “patch party” for my local co-op. My wife and I water tested and marked tubes at the shop since they have an air compressor and then took the tubes home and patched them before folding, size marking, and banding. This is the pile of good tubes.
In all, we patched about 150 tubes of various sizes. None of the volunteers really want to patch tubes so most of these were pre-pandemic.
Personally, I get anywhere from 20 to 50 flats a year. 90% from goatheads. I even got a goathead caused flat in November 2020.