I came to really appreciate React over time.

My initial objections were: (a) circa 2006 I was making very demanding RIAs such as knowledge graph editors and GIS decision support software and I've yet to see any modern framework that is as good as what I was using then (not in JS but rather GWT and Silverlight w/ the same async comms) and (b) the React model is not a 100% match for the form-based applications that we usually write with it (but boy do I love react-hook-form)

React is like the code in Graham's On Lisp [1] in that functional programming is used to create a sort of DSL. There are a lot of ways to implement reactivity that usually require a special interpreter (spreadsheets) or compiler (Svelte). React's system does show seams (you really need to be on top of identity and equality) but it is remarkably simple.

React shines, in my mind, for things that aren't form applications. For instance, VR applications with AFrame -- it's somewhere between VRML and Unity. I am working on a (mainly) heart rate variability biofeedback application [2] and it is so easy to make dashboards that display real-time metrics as well as Poincare sections and time series. That is, I can slap together a few data processing functions and widgets and make a new dashboard with new metrics and charts or new sensors. One goal is to get it working on a tablet in a two player version.

The disadvantage of React is that it does not work so well for highly dynamic layouts. In my case I have a library of functions to "fetch" the data stream and put them into the top of the component (may even package as hooks) and then put the layout together with JSX. I'd like to have a version where the user can drag and drop the components to make a custom layout and the system figures out the dependencies for the data fetching, preparation and processing like the things I made in 2006 and that kind of application with a dynamic layout (think programs like Photoshop with lots of different little widgets and property sheets) wants a different approach to reactivity.

[1] use of macros in that book is a red herring, the one example in it where you really need macros is when he is implementing cooperative multitasking, a feature that Python and Javascript already have -- most examples from that book as with Norvig's Lisp book can be coded up just fine with

[2] see https://github.com/paulhoule/VulpusVision it might "just work" if you npm install, npm run dev, and look at it in Chrome and connect with a Polar H10 or other BT monitor