When turning wrenches to pay rent our shop plugged probably 500 tires a year with life of the tire guaranty.
I only recall one came back and we just shoved another plug in.
I carry a kit in the truck just in case.
Price was about $7 for a plug. Patch was close to $20 + balance if requested. Most went with the plug. Most plugs were done without even taking the wheel off the vehicle. Patch is time consuming.