And why Ethereum is in such huge trouble that nobody seems to acknowledge. It took Satoshi a long time to create the consensus mechanics of Bitcoin, now you have Vitalik trying to create one on the fly after the coin was already released. They can't copy standard proof of stake due to all of it's negatives. He's either going to have to beat Satoshi, copy DPoS, or a far more experimental method that might end in critical failure like a DAG chain.
It would be absolutely insane for Etherium to actually go through with changing the core consensus mechanism of the chain. Like it or not, there really is no viable alternative to POW at the moment.
edit: only POW provably solves the byzantine generals problem in the face of sybil attack