It absolutely baffles me that people still like to call React a "Technology du jour". It's ubiquitous today. It's _THE_ go-to front-end web development UI framework.
In your bubble that might be true.
In my bubble everyone is still using mostly ad-hoc jquery consisting half of snippets copy-pasted from stackoverflow.
What bubble is that may I ask?
I share a bubble with eterm, in a Fortune 100 enterprise. I have heard React mentioned once by a particularly engaged front-end developer, but everything I know of in production is JQuery, a couple Angular 1 apps, and a whole lot of horrible older stuff.