Quote Originally Posted by OtakuSempai View Post
Proof of work is still orders of magnitude more inefficient than even a Visa transaction. The criticism is still valid.
You seem to be confused. The proof of work mechanism is a competition to write transactions to the ledger, but has nothing to do with the transactions themselves. If you are talking about raw throughput, things like Segwit and Taproot reduced the blockweight of transactions, plus the lightning network completely demolishes Visa in cost per tx. Further, here is an article for you regarding environmental impact: https://hbr.org/2021/05/how-much-ene...tually-consume .