Yeah, one difference between React and, say, Unreal Engine is that Unreal Engine is the brand for the whole package while React is the brand for one of the core

Yeah, one difference between React and, say, Unreal Engine is that Unreal Engine is the brand for the whole package while React is the brand for one of the core components. ("I'd just like to interject for a moment. What you're referring to as React is, in fact, React/Redux/Tailwind...") Once you've bought into the whole ecosystem, you get an "engine" that wants your app to look and work a certain way just like how Unreal wants your game to look and work a certain way. You can customize it however you want, but every decision you don't make is made for you by the engine. And even when you are making the decisions, the engine is always there, nudging you in a certain direction by making some things easier than others.