[douche]

Saving a handful of kb on a JS library quickly gets shot to hell when you have to load up sixteen analytics trackers, an auto-playing video, and a bevy of unoptimized ad images.

There is lower-hanging, bigger-buck-for-your-bang, fruit if you're trying to fight page bloat.

[Klathmon]

And React can't prevent any of those. React can only change React code, so they optimize it as best as they can, and leave the "user" of React to optimize everything else in their own app.