I seem to recall that @sambam mentioned that the commando half lug soles had been updated to a very long wearing rubber compound. I have them on my triple sole smokejumpers and while they haven't had a ton of wear, the soles still look brand new.
That would be good. I checked the half soles on my new SDs and the lugs feel just as squishy as I remember on my Beckmans from a few years back, but perhaps the compound is different and squishiness is not a measure of longevity