I guess it truly does come down to preference and perception, as looking over that link you provided I actually had the opposite reaction!
I prefer the DOM API in each example, save for examples that are clearly out of date to support old versions of IE without a polyfill (e.g. all the AJAX examples at the top can use fetch, other can use Object.assign, no use of the iterator interface anywhere, etc)
It takes twice as much typing without the chainable, unix pipe like API. I really don't get it, but I've been baffled by this industry's decision for more than a decade.
I prefer the DOM API in each example, save for examples that are clearly out of date to support old versions of IE without a polyfill (e.g. all the AJAX examples at the top can use fetch, other can use Object.assign, no use of the iterator interface anywhere, etc)