We use React, Angular and Vue for websites where 99% of the functionality could be done without monstrosities like CSS-in-JS.

Over-engineering websites has been around forever. That's partially why jQuery is modular, letting you pick what you need.This covers the 'use jquery for just this one thing' crowd. And if they're lazy, well, they can hang their heads in shame because they have added an entire 83 KB to the page's initial load time. /s

(unless the browser has a CDN cache stored, in which case it wouldn't impact load time at all)