I thought about that but it makes the visualization much more complicated and, moreover, would require forecasting wages way out into the future to be relevant

I thought about that but it makes the visualization much more complicated and, moreover, would require forecasting wages way out into the future to be relevant to a millennial. If you had tried to do some wage forecast in 1970 you would've gotten things very wrong, so maybe the same is true today. One day I will add this feature but not soon.