Re: A useful PoW without replacing Nakamoto Consensus

This isn't a valid metric because the algorithm determines how many hashes is "alot".

There's more to mining than hashing [1].

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Not so if you double memory req every 2 years then miners would only be able to use the newest cards.

Then you'd want to use a memory-hard PoW that can be instantly verified with no memory, or PoW verification
will be unbearably slow.

[1] https://web.archive.org/web/20210506232722/http://cryptorials.io/beyond-hashcash-proof-work-theres-mining-hashing/