[yashg]

Proof-of-work consensus mechanism makes sure, as the blockchain grows, transactions become MORE expensive. Discarding PoW in favour of PoS or DPoS just makes 51% attack easier. It's far easier to control 51% of coins than to control 51% of CPU power. We are not talking about single individual but a nation state or a consortium that can control the network. They may not do it for hacking it, but to control it and enrich themselves. Essentially centralizing the token which was supposed to be decentralized and remove the middleman.