• Threads per year (on/off-topic)
    A stacked bar of threads per year, split on-topic vs off-topic - the community's volume arc from genesis to silence.
  • Topic mix over time
    A year-by-year stacked chart of topic composition - how the conversation's subject mix shifted across the eras.
  • Participation by year
    Distinct thread-starting voices per year against that year's thread volume - the community's active headcount over time.
  • Thread sizes
    How the corpus's threads distribute by live-window post count - the shape of the conversation, from one-post asides to long-running discussions.
  • Channels over time
    Thread starts per source channel per year - the net.music.gdead to rec.music.gdead handoff, read from the corpus.
  • The decline curve
    Monthly thread starts across the final era - the long tail into silence as the community migrated off Usenet.
  • Scene sentiment over time
    A directional prefilter of scene-commentary posts by year - decline-leaning versus affirming versus both - beside the 1986 decline-and-affirm exemplar.

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