> The general form is that crypto can't do X. The response is that an obscure implementation Y does do X. The problem is that Y, while existing, largely doesn't

> The general form is that crypto can't do X. The response is that an obscure implementation Y does do X. The problem is that Y, while existing, largely doesn't address X in practice because Y's trading volume and/or market cap is insignificant. Sure, but this presupposes that Y's trading volume and/or market cap are indeed actually insignificant. A lot of people make that presupposition, but it's often about as accurate as a drunk chimpanzee playing darts. Proof-of-stake is the case-in-point: "but but Ethereum hasn't switched yet so therefore PoS is obscure", quoth the "skeptic", entirely ignoring that multiple of the top 10 cryptocurrencies by market cap and/or transaction volume are already proof-of-stake and have been for some time now. Even taking that presupposition at face value, what's experimental today is less so tomorrow. That experimental solutions do exist bodes well for the state of things even months (let alone years, let alone decades) from now. If you want to wait until then, then you do you; meanwhile, those of us willing to experiment will do so.