Well this isn’t new is it? I recall chat from 2015 where people were pointing out that mining is just bad. Even when Ethereum started growing, one of the big arguments quickly became that proof of stake would be a superior approach.
I agree. I think the use cases have never materialized. I do believe there’s potential in peer to peer, or at least federated approaches. Email works. Matrix works. Irc works.
But I don’t think that a globally replicated ledger is the way to go. Especially with the ambition to use it as the basis for a currency that’s expected to be used for every day purchases.