I also have two. For some reason, the stainless steel san mai version never felt as good in my hands as the original. And you’re right about that near-indestructibility. Some of the early advertisements showed someone punching the knife through a car door. Another one showed the knife being hammered into a tree and then someone standing on it. Mine has a wicked razor edge on it.
Noss had a YouTube channel years ago that did knife destruction tests. I think it was taken down. The GI Tanto was ridiculously hard to destroy.