Speaking for us (Sentry) it's utterly frustrating that we now have to add framework specific code in so that error handling works again for customers. I think the number one complaint was minified exceptions over the last year where we just encouraged people to not run with the production environment. This is clearly a step to something where customers can be satisfied but the cost is that we now scrape your codes.json and add custom handling just for React.

It's a terrible precedent and lacks any sort of standard :-/ I'm not a fan of this sort of pattern spreading.