So, having asked for suggestions, I’ve now got plenty for the next few days.
Pietro has a whole list (thanks, I think).
I’ve removed the WordPress dependency for drawing graphs. The only excuse for that was speed of site launch.
The data and graphs are currently being cached for 12 hours (update: 24 hours now). I’m still messing with the caching logic (update: done) and might need to change a few things if/when the date based zooming works.
The ToDo list now has comments enabled. Be nice.
The possibility of graphs based on the (number of tags / author) is interesting and I’ll try to think through getting the x-axis to reflect authors instead of dates. It will allow for more granular analysis for sites that don’t yet have a lot of tags.
Having a log scale for the y-axis at this point does more damage than good for being able to see the trends. The characteristic “cultural changes” are much less pronounced (the diagonals aren’t as strong) and the rest of the data begins to take over the aesthetic. Maybe that’s not the point. Still working through this.
I do think that having a normalized y-axis would be interesting (all weights sum to 1). A side by side comparison to the current graphs might yield additional insights.