+1 for that feature!
We would then only be able to see the most recent information, no history would be given. (At least as long as the graph is plotted two dimensional.)
My problem is that I would like to visualize the same information coming from about 20 different jobs. (Outstanding Issues from a static code analysis.) It is almost impossible to figure out which color blob in the legend is corresponding to what bar/line in the plot. Being able to see the history of the data is great but I would disclaim that feature in this special case, if I therefore would be able to see the job names on the x-axis.
I have made a screenshot of my current plot. Can you be figure out safely which bar corresponds to what element?