Why does Ethereum project use custom denominations (e.g. "wei") instead of SI prefix standard (e.g. "microETH", "nanoETH")

Question

What was the reasoning behind reinventing denominations instead of using the standard metric prefixes for ETH?

10^(-18) ETH = 1 aETH ("attoETH", not "wei")
10^(-9) ETH = 1 nETH ("nanoETH", not "Gwei", definitely not "shannon")
10^(-3) ETH = 1 mETH ("milliETH", not "Pwei", definitely not "finney"!)
etc.

Answer 1

The wei is named after Wei Dai, best known as the creator of the bitcoin predecessor "b-money" and as the developer of the Crypto++ library.

These units names are defined in the Ethereum whitepaper.

Sources : https://github.com/ethereum/EIPs/issues/33 https://www.investopedia.com/terms/w/wei.asp