tldr; Ethereum’s PoW and Proof of Stake (PoS) blockchains need more randomness to prevent attacks on the network. The blockhash is the only source of randomness on a PoS blockchain, but it can be manipulated by a miner to prevent others from producing blocks. In PoS, the selection process must be fair to all validators, and a “round-robin” system gives an equal chance to each validator.
This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.