Just guessing...but, I suspect, the high levels of alloyed elements would make forging difficult for most amateurs.
Can't imagine using stock removal, effectively.
But, then, I am not a knife-maker.
They say the universe has been here for something like 13 billion years.
And what do I get?
A lousy three score and ten!
I guess I must be using someone elses' leftovers, now.