These days people on HN love to advocate sockety frontend solutions like Phoenix LiveView, where every stateful interaction causes a roundtrip, including ones that don’t require any new data (or all required data can be sent in a batch at the beginning / milestones). It’s like they forgot the network exists and is uneven and think everything’s happening in-process.

To ward off potential criticism: I know you can mix client-side updates with server-side updates in LiveView and co. I’ve tried. Maintaining client-side changes on a managed DOM, sort of like maintaining a long-lived topic branch that diverges from master, sucks.