I don't understand the concern. curuiosityt I understand, but concern I don't. I have beaten the hell out of every Scrap Yard blade I own, a humble few, yet I have never had one fail.
I have broken blades away from the handle before, but it was never a blade with an actual tang.
Worrying about the strength of a tang (I am not assuming this is what your post is about, just voicing my thoughts) is something only people who do destruction tests should worry about.
I have yet to meet a person who had a Busse Kin or any other reputable knife company blade fail in the line of duty.
Well, thatks my two cents. Please return the change.