It’s just a head-of-line-blocking question, though…I imagine mostly you’re not downloading lots of CSS/JS/images, which is the big head-of-line issue HTTP clients have - they can render the page partially in response to each new item they get off the wire.

I assume you don’t, really, though? You presumably get events back from the server in time-order and populate the page down in time-order, so mostly one event stalling the next won’t make all that much difference in UX?