For us to accept that the optimal volume at any one time can be “dynamic” or changing, we need to be able to identify the mechanisms that change. I did a short analysis of the possible mechanisms in this post. It seems quite difficult to identify a mechanism that could allow very large increases in the optimal volume from one week to the next.

https://medium.com/@SandCResearch/thats-a-good-question-4203ffe8af2f