I'm not a frontend dev, but from cursory reading of htmx docs, it seems your example implying every chat message would require sending the full log to every use

I'm not a frontend dev, but from cursory reading of htmx docs, it seems your example implying every chat message would require sending the full log to every user is a bit of a stretch - a more natural way would be to transmit only the new messages and use one of the "before" or "after" swap settings to insert them where appropriate.