[sametmax]

The naming all life cycle methods, the grouping of things by categories in data, methods, all the things you don't need to learn to make jsx do what you want, the whole props/callback things that is vastly simpler, no set state shenanigan, no two ways with consequences of creating components, the use of standard html attribute names and not js dom api names, etc.

That makes manipulating the api way simpler for me.