So we've gone from using components with lifecycles - in the form on JSF and Web Forms, to using components with lifecycles - in the form of React and Angular.

I'm not knocking React or Angular - I use and enjoy them both. And I find it much more convenient to have components that live entirely in the browser instead of trying to maintain a stateful UI server-side; I certainly don't find Web Forms or JSF development to be very enjoyable.

I just find it mildly amusing that front-end web development seems to continually re-discover old concepts. That's certainly not a bad thing; better to re-discover good old concepts than to forget them completely.