https://news.ycombinator.com/item?id=19131272 . It don't know where your 2% number is coming from, but in Airbnb's experience it was much more. It feel like it would also be more, imo, but I guess it depe nds.
Typescript can be annoying but usually it helps a lot with refactoring. It's also pretty great for detecting unused props with react.
I don't use IDEs so my defense of typescript is only based on its type checking merits
The comparison Sara made was that React can be overused just as jQuery was.
The problems with jQuery is that it's mostly a set of functions to simplify Ajax and DOM manipulation so it's not really helpful for the structure of an application.
React (and other frameworks surch as Angular, Ember and Vue), on the other hand, helps you to build reusable component which helps a lot to scale.
Also jQuery's golden age was when browser compatibility was a big issue, nowaday, most browsers behave properly.
There's no harm in learning jQuery, its interface is way more intuitive than native DOM apis. It could be a good idea to try and build a simple app with jQuery and see what are the pain points and then compare with a modern framework.
Basically, it's just a proposition for the moment, there's no telling if that's gonna be in the language or not. It's only at stage 2 that it is likely that the feature will be added in the language.