There is really only one difference between LiveView and HTMX: LiveView is stateful and HTMX is not. Everything else (like the much more thorough list above) is directly downstream of that.
Honestly the differences between what LiveView is (a stateful app on the server patching a thin client) and what HTMX is (stateless XHR into DOM) are substantial enough that I don’t really see how they can be compared at all. This is not to say that one is better than the other - they just do completely different things. The programming model is wildly different, and so are the use cases.
The only other thing to note is that what LiveView does is really only possible on the BEAM, as it can actually handle that many stateful connections without catching fire. The HTMX approach on the other hand is something you can do on any stack (including Phoenix!). But again, they are completely different approaches that are not useful for solving the same problems.
