Maybe I’ve missed something, but the eco-friendly blockchains you’re describing are virtually all using some variety of PoS (“PoH” for solana, so-called “Nakamoto” PoS for Tezos.) I’ve yet to encounter anything convincing me that PoS in its various incarnations, does suffer of centralization in a way that PoW doesn’t.

Maybe blockchains are useful somewhere outside of crypto speculation, but blockchains that are marketed as eco-friendly and secure and decentralized deserve extra scrutiny in my mind.

I don’t have a dog in this hunt, but I do try to keep up to date with the technology. POW sucks in terms of resources, but PoS sucks in terms of centralization, and, it follows, security (the core selling points of blockchains)