It's also meant to suggest where things are going (the kind of a chart I have in mind is this one https://twitter.com/bgavran3/status/1422206118688956420 https:

It's also meant to suggest where things are going (the kind of a chart I have in mind is this one https://twitter.com/bgavran3/status/1422206118688956420 https://twitter.com/bgavran3/status/1422206118688956420 ), though I understand this is something that deserves a much more substantial proof.