We've talked about it, but so far no, it messes with the x-axis a little too much (averages, history, compare, everything needs to work & line up across both ti

We've talked about it, but so far no, it messes with the x-axis a little too much (averages, history, compare, everything needs to work & line up across both time & northern/southern hemisphere, and what graph has two x-axes anyway!? ;) and while neat it's a little marginal from a substantive utility perspective?