Seeing the number of registered forum users grow, seems like it would be interesting to see graphs of that growing over time, and related forum time-domain statistics -- do we have such tools?
Semi-related:
I can sort the memberlist of the Forum by "total posts", but as the years pass, that will get of less relevance -- it would be nice to also be able to sort by "posts in the last 30 days" or some similar measure of fairly current activity/participation.