I can't tell you how happy I am to see this. I do this too and get funny looks from fellow riders. My personal limit is six patches per tube, only because that's how many patches are in the kits I buy. I ride in goathead country and have gotten multiple flats per day, even with liners. I've also never had a glue-on patch fail in many decades. I tried a (brand name) glueless patch once at a friend's urging, and it lasted half a day, less than 50 miles. I think they're good to get you home on a day ride to put in a new tube, I guess.