Yes, but the point is the sentenced time for federal crimes tends to be much closer to the result of calculations under the federal sentencing guidelines than it is to the statutory maximum for the charged offenses.
I would guess all the factors that go into "how long will someone actually be incarcerated" are interesting and on topic. Why would just one be "the point"?
I meant “the point of the post you are responding to, which you seem to have missed”, when I said “the point”; I thought, in context, that would be clear.