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Humans don't want to destroy the planet. Humans also want a peer-to-peer banking system. They'll find a way to make it happen without destroying the planet.

I'm not going to pretend I'm expert enough to tell if that blog post is right or not. Vitalik Buterin and a lot of other very well informed people seem to disagree. I suppose we'll find out. As someone mentioned in the comments when that was posted, if you think you have a way to double-spend on a Proof-of-Stake system, then go onto one of the many existing PoS chains and prove it. Talk is cheap.

[purerandomness]

I hope we'll have a peer-to-peer banking system one day, but as it turns out, the current approach, just as the approaches before, falls short on multiple levels.

> Vitalik Buterin [...] seem to disagree

Vitalik is quoted twice in this blog post to drive the entire point home, you can quickly Ctrl+F for his name.

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Yes, he's quoted where he explains why he thinks the issue the blog post is talking about is not a problem.

Like, I said, I'm not going to pretend I fully understand all the math and everything behind it because I don't. If it doesn't work, prove it. Otherwise you can look at the trillions of dollars worth of value being moved around the world right now on blockchain networks and you can surmise that the current approach is very much working.