Conflates AngularJs and Angular (2+)... which is problematic considering they're very different beasts with component libraries that are incompatible. I'd suspect the survey referenced also does similar.
While not a bad article, I wish more people would just use the fetch (node-fetch, isomorphic-fetch) interface... I know some may be slightly easier, but in general fetch is good enough, and you can always create your own "client" that will abstract it's use a bit.
Very cool... The rate limit shouldn't be an issue since it's from the unauthenticated client, which allows one request per minute. Combining with sessionStorage to only refresh if on the page for 3+ minutes could even be reasonable there.