I suppose every incidence of wheel damage is specific to that incident,i.e. someone may knock a chunk out of an OEM alloy and the tyre stay up, the next incident the tyre will be damaged and go down so there are no hard and fast rules in this one. I agree with Jon in the fact that the OEM steels are very strong although one of the set I sold I has to straighten the rim before I painted them so obviously they are not indestructible, it could be argued what bent that rim might have broken an alloy or taken a chunk out or not who knows?
Maybe OEM steels may have an advantage if a truck is fully expedition prepped and maybe 30% heavier than standard?
Andy