As Tunggalametung has commented, product mix is very probably a valid explanation for keris produced during the current era.
As I believe many of us already know, talismanic properties of keris played a role in the decision of dhapur and pamor selection during some past eras.
There were other reasons for keris form at various other times, and at the moment I would prefer not to comment further on this matter.
The important thing to realise is this:- the nature of the keris has not been constant and unchanging during its very lengthy existence. When we consider the nature of the keris it must be considered within a particular time frame.
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