There's no need to wonder what it "could" be about, it's all explained at the link. :) I reported this size issue to them during beta test, and they ignored it

There's no need to wonder what it "could" be about, it's all explained at the link. :) I reported this size issue to them during beta test, and they ignored it. At the time I was on a limited cellular plan with no home wifi, so 600MB was a huge bullet. BTW, the old app was ~180MB and the one before that was ~50MB. It wouldn't take much engineering effort to address the size issue, but somebody in a position of power would need to care about it.