Also Ben Barbersmith (in this tweet thread):

> From my limited understanding, Proof of Stake doesn’t require the same exponential growth of hardware & power. If that’s correct, then I’m not against it.

> I love the philosophy & promise of cryptocurrency! But I can’t excuse the negative impact of the current implementation.

> When proof of stake becomes the norm, I’m happy to reverse my opinion. If it doesn’t cost exponentially increasing power and hardware, I’m down.

Wish he would have informed himself a bit more before making blanket statements