On a side note, I have mixed feelings about PoS. The idea behind Ethereum - that is, as I understand it, being able to deploy smart contracts using a Turing complete language -, is pretty intriguing; but the costs associated with doing so put me off. I tried to estimate how much it'd cost to deploy a fairly small smart contract a couple days ago (admittedly when 'gas costs' were high), and it would've been several hundred dollars, perhaps even surpassing a thousand. It seems like PoS would lower that, which is good, but comes at the great cost that people who aren't already in the game won't be able to acquire Ether without basically paying cash for it. That's a weird dependence on fiat currencies for a 'decentralized ledger'. (And yeah, there might be other means, but none of them are really practical for the average person.)
If there hadn't already been cryptocurrencies, nobody would've thought PoS to be a good idea. A bunch of people who hold some digital certificates that predictably multiply themselves want people to give them money to 'acquire' those? That would've sounded like a scam to me...
[0] https://decrypt.co/31646/nearly-120000-ethereum-wallets-prim...