Cryogenically treated, micro-grain, solid carbide tooling became "all the rage" back in the early 1980's. That is the last time that "I" remember (Cryo) treated metals being espoused as-
"Cutting Edge" tech.!
The Future of Hifi is just being Discovered
I found this to be very interesting to learn that electrons move like water. Also even more interesting to learn Cryo really is on the cutting edge and it's implications for the future are just being learned. Fascinating stuff