I never said that they don't work. Or even that I've never used them. All I'm saying; is that string plugs are designed to be a temporary repair and should be used as such in the interest of your own safety.
You wear a $600 'stitch, a $600 helmet, a high-vis vest, heated gear, $500 boots, sleep in a $300 tent on a $125 pad, with $1200 worth of custom luggage, all riding on $300 worth of tires. Totally dependant and trusted to a .25 cent peice of rope with some red shit on it.