I swear this used to be a setting, but now I can't find it, and all versions of a game I moderate are being counted as equals, even though the new versions are what matter. Is there any way to make it so runs are automatically labelled obsolete when not using the latest version/default of a certain variable?

There used to be a way to have a specific variable value be the default thing the leaderboard is filtered by, but that doesn't seem to work anymore (idk if that's a bug or not but honestly, good riddance, terrible feature). If you have different versions of a game that aren't comparable then it sounds like some kind of split might be a better solution than outright hiding other runs anyway.