I have been driving 4WDs on Michelin all steel radials for 42 years - Land Cruisers, F350, M37, and U500. In sizes ranging from 7.00R15 to 395/85R20, for about 5-600,000 miles.
In that period I have had about 2 minor tread punctures and only 1 major failure. The major failure was due to a shock locking up and breaking in half on my Unimog and one of the pieces ate out the inner sidewall of a tire - definitely not the tire's fault.
All the same, when I buy a rare tire I order six (6) unless I already have used spares. Six, so that a very unlikely failure will still leave me fully mobile.
Charlie