I can't speak for HTMX specifically, but going to progressively enhanced server-rendered HTML from React requires a certain amount of mental deprogramming. I've been using Turbo lately for side projects (e.g., Pocket SQL) and found it involves working much more closely with browser APIs, but also writing way less UI code. Pocket SQL required writing about 50 lines of JS and people probably wouldn't notice that it's not a SPA unless they looked under the hood.
This is often why people get frustrated switching HTMX for the first time. The idea isn't to "translate" the code, but to completely rethink concepts like state and pages and things like components. Not everyone is able to conceptualize their application outside the boundaries of a specific framework.
