Yes, Ethereum 2.o will be PoS chains as it was always going to be.

The main difference between the two consensus mechanisms is that not every stakeholder needs to be a block validator in DPoS unlike in PoS. The flaw in DPoS is the high witness rewards which can lead to the centralization of stake ownership unless they are distributed to a large enough group of people. Work has been done for years to lower the cost of running a witness node on Steem/Hive. It would be cool if the number of consensus witnesses were increased in response but I don't believe that will get done any time soon.

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