Earlier quoted context omitted.
Sure it adds complexity, but isn't that what abstractions are for? We are talking about grokking how data flows in _a web app in Rails_. I wouldn't think usual workflow requires going into actual inner workings of React :p
Well React doesn't come by itself. You need a router, probably some way of managing shared state, bundling, compiling your TypeScript, and 7 other libraries The more stuff you add on the harder everything is to understand, and the less stable your app becomes until suddenly you need specialists for every piece just to keep things chugging forward. Everything needs greasing and maintenance over time.. ..and then in 4…
But maybe I'm biased because I've been working with React for a long time, I don't find it too daunting to manage dev tools around React. When React was young, I remember that there were _a lot_ of ecosystem churn but now it's more-or-less settled and I don't think it's too bad.
I don't know how Hotwire works that well as most of my experience is around Elixir's LiveView, but at least for LiveView, there is also quite a bit going on under the hood to make it performant for large lists and to handle error states gracefully. And I (maybe incorrectly) assume Hotwire is similar, so I feel like it may not be not as simple as you say. (Edit: it is simpler than React though!)