[btown]

In fact, with Javascript JIT engines (whose teams deeply understand the use of libraries like React) relentlessly attacking the overhead of DOM nodes and their initialization, and with users who actually expect the design flexibility provided by CSS... a system like React is actually an ideal layer of abstraction for modern UI implementation on practically any platform.

Sure, if you're on an embedded platform, somewhere a JIT can't run, or if you're doing something with real-time rendering requirements (and honestly modern React Suspense should even make that feasible), you may want to use something lower-level. But most people won't need to do this.

[overgard]

The DOM being slow is really more an artifact of browsers/HTML and the history behind doing document based layout. React is a nice solution to that specific problem; but this article suggests immediate mode gui's are the future, which, I don't think that's really the case. And I'm not sure I'd really call React an IMGUI anyway. It's similar, but it's also pretty different.