> Usenet was - by the standards of the early 00's, which is when it began to decline - slow, and asynchronous. Posts could take hours to days to propagate, which meant conversation threads would go off in multiple directions at once.
Maybe that was your particular experience but generally that wasn't the case unless we're talking about a server connected via UUCP to the rest of the world, possibly with a dialup link between the servers and transferring news articles every few hours or once a day.
NNTP employs a flooding algorithm whereby every server offers all messages received to every peer except the ones showing up in the Path Header of the message. Peers were first offered the unique Message-Id each message has and could then decline or accept the transfer. Programs like innfeed implemented this conversation as a bidirectional streaming protocol (RFC4644). We're talking seconds for a text posting to be propagated to every half decently connected news server on the planet.
Maybe that was your particular experience but generally that wasn't the case unless we're talking about a server connected via UUCP to the rest of the world, possibly with a dialup link between the servers and transferring news articles every few hours or once a day.
NNTP employs a flooding algorithm whereby every server offers all messages received to every peer except the ones showing up in the Path Header of the message. Peers were first offered the unique Message-Id each message has and could then decline or accept the transfer. Programs like innfeed implemented this conversation as a bidirectional streaming protocol (RFC4644). We're talking seconds for a text posting to be propagated to every half decently connected news server on the planet.