Are there any quantitative/ballpark estimates for how severely a validator would be penalized for correlated downtime with an very large number of nodes? Seems like this could be a significant centralization vector.
e.g. in an extreme case, lets say 20 million ETH are validating and 5 million are staked on Binance. If there is a massive attack on Binance and those validators are down for a couple days, how high would the penalty be? Would it be sufficiently high to discourage staking in this way?