Had 5+ on my last tubes, didn't have a problem. Now one has split at the valve and I think that is a tube killer because the patch won't adhere to the metal valve.
I normally ditch tubes if the valve dies, the hole is close to the valve (hard rubber where the patch won't stick well) and pinch flats (because larger patches often don't adhere as well and two little ones is a faff when you're on the roadside)
Had 5+ on my last tubes, didn't have a problem. Now one has split at the valve and I think that is a tube killer because the patch won't adhere to the metal valve.