PoW is what makes Blockchains of BTC truly permissionless and decentralized. It's a solution to the 51% attack. Yes PoW is resource hungry and expensive but it'

PoW is what makes Blockchains of BTC truly permissionless and decentralized. It's a solution to the 51% attack. Yes PoW is resource hungry and expensive but it's a feature not a bug. If we remove PoW to reduce cost and stop wasting energy, it just makes it another centralized system. PoS or FPoS is centralization in the hands of a few whale coin holders. Many other VC backed blockchains like Solana are not even decentralized. And to talk about enterprise blockchain like Corda or Hyperleger, I don't know if it's even correct to call them blockchain.