The text seems to me biased against PoS, and the author does not see the problems with the low decentralization of PoW, which further tends towards higher centralization. Moreover, he does not address the scalability of decentralization at all. Are a billion people on the planet supposed to use a network controlled by only 10 pools and 1000 large farm owners? PoW is a relic and PoS is one way to increase decentralization.