Musicphan,
Thanks for your thoughts.
It would be more accurate for me to say that each coffee, respective of roast, has an arc in its flavor profile such that there is a window at which that particular coffee at that particular roast is best on days X through Y.
And I think of it not just as a challenge, but another set of information, another tool to use -- even partially use -- to make current espressos shine even more, to reformulate an espresso to improve flavor characteristics from day 1, or to create a new espresso altogether.
As to discussion, I was asking the question, "Why hasn't someone already posted something similar already?"