Not sure i understand your point sadnu. As a programmer, I am just puzzled by the technology choice of not "tagging" coins to make the ledger simple and compact ; as opposed to tracking "quantity" of bitcoins being passed around from wallet to wallet.
The current ledger / accounting methodology will grow infinity and break at some point.

I am sure i am missing a huge debate around this topic ;  hence the request if there was a debate on this early on in bitcoin dev days.