1st and foremost for quick, easy back on the road/trail fix. 2nd is more options for repair. If the hole is too big or mangled for a mushroom plug, a patch could fix it easy enough. Then there's also the ability to carry a spare tube. So all in all more options. I've been running Outex for over 20,000 miles with no real downsides. I've gotten back on my ride from a flat within less than 5 minutes by using mushroom plugs. When I had a slightly more dire moment I was able to install a tube to continue the ride. It's all about options and backup.