Digital sales out-revenued streaming until sometime 2014ish, and there was a window in which that happened while it also beat out physical formats.

And it "declined fairly quickly given streaming" because buffet streaming services basically fucked with the economics to offer a product designed to replace recording collections while paying a fraction of the price... and fractionalizing revenue to those who create the content. Or in other words, solving piracy by merging the economic model of piracy with an updated middleman model and capturing as much value as possible in between.