[16bitvoid]

To add, it's also the how the information changes over time. Often, the same questions get answered and similar topics get discussed multiple times over the years for the topics where related information doesn't remain static. It's always interesting to see how certain things evolve over time.

The only example I can give off the top of my head is subreddit for the game No Man's Sky. Its subreddit provides the best illustration of how the game has evolved compared to anywhere else. Not just in player sentiment, which could be gleamed from Steam reviews, but also how aspects of the game have changed that are better reflected in pictures and discussions than a changelog or release blog. For example, you can find screenshots of how the procedural generation of planets in the game has changed from 2016 to today, interesting bugs that only existed for a specific patch, datamined assets that never got used, etc.