But I object to the argument that people can just continue to do their thing, because people in that position are overwhelmingly dependent on the ecosystem. Guidance, libraries, tools. And that ecosystem has left them behind, or is at least very far along that road.
Of course reasonable people might disagree, but to me, that people might write unoptimized (or just plain horrible) code is a very, very small price to pay for the empowerment the web delivers to them. And as to "insecure" - Jane and Joe want to show a slideshow of their hand-baked Macarons, not write banking auth systems. If they manage to open up a security risk, the attack surface is usually rather small, and the fault lies with the platform.
No, I stand by this: Javascript was our generations Hypercard, on steroids, and we've almost completely squandered its potential.