(1) eUTxO model, which Cardano follows is far more superior when it comes to concurrency and parallelism. Account model of Polkadot and Ethereum forces them to shard, sharding is pretty hard and reduces security of blockchain and opens it to new attack vectors.
(2) Now both Polkadot and ETH 2.0 will be sharded blockchains albeit none of them proved yet that it can work well and stable. Academia didn't prove yet sharding works well with blockchains and #Cardano is following a classic approach - science first.
(3) Both Polkadot and ETH 2.0 follow more empirical approach let's try - maybe it works and if it works then yes it works. Who knows maybe it works?
(4) IvanOnTech summarised it very well, he said: "ETH 2.0 is being developed by #PrysmaticLabs by jumping out of plane and building parachute while already falling down".
(5) Experimenting by being in production (main-net) is fine for some but there is a moral and accountability problem, people can loose money when you make mistakes, neither PrysmaticLabs nor ConsensSys won't be accountable for hacks and money lost. It will be hard to defend it.
(6) So @IOHK_Charles is being hated by a lot of members of #Ethereum and #Polkadot community but he actually has in that sense higher moral standards! As usually - reality is reversed and distorted for certain political and financial motives! People will never change!
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