You're correct, the devs are already committed to deprecating the websocket API. This may make caching easier in the future and people may use it more as a result. I'm a little bit skeptical as most of the the heavy requests are from authenticated users, and web-proxy caching authenticated requests without risking serving them up to the wrong user is also non-trivial. But caching is not my area of expertise, there may be straightforward solutions here.

But my comment was in reference to current releases in use on real world Lemmy servers.