JSF and GWT were rightly abandoned, but the new frameworks are different in ways that might be relevant. One of the main problems with JSF is the mismatch between it's stateful programming model, and HTTP's statelessness; as I understand it, LiveView uses a persistent websocket connection to a stateful server process, so that mismatch doesn't apply. Another JSF problem is it involves a component-based templating system that abstracts quite a long way from HTML, making it hard to figure out what's actually going on. LiveView, Hotwire, and htmx all seem to be much closer to HTML, which might make them easier to work with.

I admit I'm still to scarred by JSF to be keen to try out these new frameworks and find out if they've actually solved these problems, but I'd love to read an evaluation of the new server-side frameworks from someone who experienced the problems with the old ones.