Comment by satvikpendem

Wrong on both counts. I've worked in companies with vanilla JS only and made parts of those frameworks they ended up building. It is absolutely not "relatively tiny, fast, piece of code that is specific to that site's needs" and once we switched to React we actually saw improvements in many parts of the sites' loading speeds. Next you're gonna No True Scotsman me by telling me the company was just bad but I've seen enough examples at other companies to see that using React or a similar framework is simply the right move.