[kemayo]

I guess I could see it for decoupling your need to control the API you're using. The case where you have an existing API, whether your own or someone else's, and just want to get a new frontend hooked up to it.

[purerandomness]

Just put any template rendering engine in-between.

Htmx is "bring your own backend", but you do have to have a backend, be it Haskell or Zig or Gleam, that talks to your API, and renders HTML.