I run sites that serve hundreds of millions per day and we pour a ton of resources into these projects. We're trapped in a framework (react) prison of our own creation. All failures are those of complexly. Highly coupled state machines with hacked, weaved, minified, compiled, transpiled, shmanzpiled etc. into unreadable goop in production. Yes I know source maps, but only when needed, and they are yet another layer of complexity that can break - and they do. How I long for the good old days before frameworks.
Perhaps nostalgia and the principle of KISS (and a few others) is clouding my judgement here, after all, frameworks are made for a reason. But it's difficult to imagine a new engineer having any more difficulty with vanilla than learning framework after framework.