> A lot of pages in Misago are implemented twice: as Django templates and React.js components.

I think this tells all about the level of competence of these devs. That’s literally unmaintainable. So instead of fixing the problem and have a nice api + interface + ssr, they patch it up with a yet worse approach in htmx.

> there's a lot of forum software out there that still does the old way of rendering as much as possible on the server and using some JavaScript on client to improve its interactivity here and there. And people are happy with that

Yeah, server returns class xxx and jquery needs to target that. Once is out of sync silent bugs will appear. And will be many, not a few. No way to check at compile time.