You are looking at the problem from a developer perspective, not from a user/reader or content creator, your article just gives tops 1 paragraph to the issue at start talking about syntactic validation and micro-optimizations that the user/reader doesn't care. The point is we don't need AMP, we can deal with caches and the bullshit micro-optimizations ourself, ppl don't care if the page loads instantly or in 4s-6s, despite any claim Google does.