Oh, that’s me! My Mac AW4400 1/2 was used for hard to break loose stuff only. That impact has tons of power but it weighs too much and sounds like a tractor trailer Jake brake. So the 3/8 was what I grabbed for any lug nuts on 1/2 ton truck or smaller vehicles.It's always gotten on my nerves to witness Mechanics use 3/8" Impacts to remove Lug Nuts. Break Away Torque is ALWAYS much higher than what the fastener was originally torqued to.
A Mid-Torque 1/2" is perfect for Lug Nuts, Though there are 3/8" Impacts built on the same frame with the same ratings, But why beat on your 3/8" sockets like that?
Sockets held up fine but my 3/8 impact lifespans were not the best and needed some replacement hard parts along the way as well.