I always get downvoted when I say this, but React is imo the biggest piece of astroturfed garbage corpo-slopware in the history of software engineering. It achieved such ubiquitous status for a few reasons:

(1) The extreme boom of software engineering as a "get rich quick" career over the past 15 years, and it being the "default" framework for doing stuff on the web. It's so bad, in fact, that most developers these days don't even really understand the difference between a backend and a front-end. I've had to explain, from first principles, how cookies work. All these very important details are simplified or straight up buried by React and its ecosystem.

(2) The overall groupthink of engineers: a lot of us will weirdly become fixated on some framework, operating system, programming language and turn into absolute zealots. This has a long and storied history (Linux vs Windows, C++ vs Java, and so on, so it's nothing new). React just happened to capture a lot of the zeitgeist even though it was objectively the wrong tool to use for like 90% of use cases.

(3) Terrible alternatives. I mostly blame the W3C for this, as JQuery helpers (selectors, AJAX/websockets, etc.) should've been inducted in the DOM standard much earlier and because the W3C (and by extention, the ECMAscript committee) is essentially a beaureaucratic battleground for big tech[1], it's painfully slow to get anything passed, standards are all over the place, and everyone tries to push their own agenda (Google wants to track you, Facebook wants social stuff, Apple wants secure payments via fingerprints, etc.)

(4) The startup boom of the last 15 years or so. This has always been a bit of a problem, but a common trope has been (and still very much is): if it's good enough for "huge tech company," it's good enough for us. So you've had a ton of startups that have been built from the ground up on React and the sunken cost has always been too much to switch.

[1] https://www.theregister.com/software/2018/04/13/go-away-kid-...