Hasn’t Cardano already shown that POS works and it did not have the effect that you predict? I’m afraid most people in the crypto world don’t care one bit about the carbon foot print of these technologies.
Cardano has a tiny market compared to Bitcoin or Ethereum. And as we've seen over the years, a lot of problems only show up at scale. So if Ethereum is able to run PoS safely, it will be a much bigger deal.
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