Blockchains can, and most likely will, be federated. Legal agreements can be managed via such a system. Bear in mind that the blockchain does not solve politics, and all the problems you mention are a problem of the currently most common implementation of a blockchain, which is cryptocurrencies.
But like, why? Sure, blockchain can do a lot of things, but it’s not clear that it’s better than an API for the vast majority of applications while being worse in a number of ways. You can put similar governance rules on an API without the complexity. The flexibility inherent in human interpretation of legal agreements is a key feature of a common law system like we have in the US.
To echo the author’s thesis, we’re no longer in the early days of blockchain. We’re over a decade in and nobody has gained traction with a use case that isn’t purely speculative. That in and of itself should say something.
Blockhains can be as simple as an API. See the 7 layer stack in the Nexus blockchain (you definitely don't need to go smart contract all the time).
I think the author exaggerates a bit the tone. Sure, 10 years is a lot of Internet time. But the steam engine took 50 years to become viable. Then the industrial revolution was a period of 80 years. Put that into perspective.
I guess, by speculative, you mean the cryptocurrency craze.and I can agree is a speculative bubble, an MLM scheme. But then you also have https://cyber.ee/resources/news/digital-identity-and-blockch... . You'll soon have CDBCs. And when it's here, you'll barely remember what this conversation.
I’ve done some work in the supply chain space around blockchain; the problem is that in many industries there is already an oligopoly of 2 or 3 companies that control things. They have no incentive to give up any amount of control; instead preferring to lock their customers in to their products and platforms. Governments are the same in an international sense.
The technical problems are solvable. The political ones are not.
