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Crossing the Road
I don't think the two feet adds much, if any, added benefit against predators that the hardware cloth won't do.
According to the YouTube videos put out by Carolina Coops, custom builders of chicken coops, the two foot predator apron works just as well, if not better, than burying wire down below the ground. Their statement is that any animal digging by the fence line will be stopped by the apron, move back a bit to try some more, stopped again, and reach a point before the 2 feet that they will give up. Something about them not wanting to dig a long tunnel where they could get trapped. I guess that makes sense to me. Certainly laying down a 2 foot predator apron and letting the grass grow through it seems to be a lot easier.