Very interesting information, and thanks for guiding us through it!
I notice a clustering throughout many of the plots around a line and behaviour I think looks like exactly KE=2 - Probably those who never unstake HP but transfer the HBD out.
These accounts seem to be pretty numerous. That means that the liquid-staked rewards ratio of the chain really determines the behaviour of many accounts. Something to think about for the influential people here!
I can look into that segment of the data and investigate. You could be correct
I do not see any significant trend. Do you?
Not there, but let me highlight what I thought would be KE=2 in the other plots:

Here, there seems to be an increased density in the center between the two green lines no?
and here on the two white lines:
original so you can see below where I highlighted.
Maybe its nothing, I just thought it could be an interesting feature.
It’s nothing. Because both your highlights and my new are the same data. Just zooming in