> the sheer scale of it seems to have grown dramatically in the last few decades.
Do you have a reference for this? Because I suspect it is not true. There was certainly a peak in the early 90s, which is on the outside edge of the "last few decades," but there was also a peak in the 70s.
Do you have a reference for this? Because I suspect it is not true. There was certainly a peak in the early 90s, which is on the outside edge of the "last few decades," but there was also a peak in the 70s.