The software doesn’t care, topics can be hundreds of thousands of posts if we want and it all indexes ok.
It was more of an attempt to make the forum a bit more approachable for new people. The thinking was that anyone that came across Mudspike and was interested in DCS (say via a Google search) wouldn’t want to browse through a single topic with 900+ messages in it just to see what’s up today. At the very least they’d be put off, and might not even figure out the magic buttons to find the most recent posted message. Long meandering topics stop people from joining up or even posting, it can be intimating joining in or starting a new topic; that’s not really particular to here, it’s just how it is online when it seems like a group of old friends.
Most other discourse forums now ‘auto close’ topics (by length or time of last activity) to try to make themselves more approachable, as active, recent and on-topic smaller topics help new members. Moderators can split topics per, uh, topic, but then it shouldn’t be the case that baby sitting is required and it’s on the members themselves to understand the motivations and help. It feels like a fight that can’t be won, so eventually the effort just stops.
Eventually someone will post ‘Why is mudspike so quiet?’ and put it as post 19,100 on a topic about 4 years long - it won’t be answered.
An exercise for the reader: use this forum in an incognito tab and then try to make sense of most topics here - that’s what a new member sees.