My last work tire had 3 plugs in it before I got the BF nail that did it in. I had no problems with the tire while it was plugged. I rode it hard and never gave it any thought. I discovered the fourth nail while at the popo garage so I had the tire changed. If I would have been out on patrol I would have plugged it. 4 plugs would be the new record in my squad. I may be wrong in thinking like this but if you have a cherry tire and it gets a nail and goes flat, then it is flat. If you have a plugged tire and a plug comes out, it goes flat. Same, same. Only difference is in cost of repair (plug vs. new tire) and in the rider's mind.