I feel this article is way off on some of some key principles of the blockchain. Let me discuss 2 points from the article.
Power consumption (and time) is point of proof of work. If it would cost less energy, it would be cheaper, so more people would start to mine. This would dip the value of BTC. But since we’re mining faster, the difficulty would quickly rise, bringing us back to where we are now.
It AI is going to find security issues, it’s going to be a disaster for smart contracts. The AI is probably going to get better in this. This means it will be able to find new issues in older contracts. Since a smart contract is immutable, this effectively means AI will be able to find exploits that can’t be solved.