Cerealsurfer's informative note sums it up for me: either infinite variable control or finite lookup table (made somewhat flexible with learning, but nevertheless finite in options at any given time point).
Paul Frere noted that from the point of view of using the engine properly, most of us were better off with an auto box, because it will in most cases outperform the (even skilled) driver.
For everyday driving it is auto for me. For my toys, I want mechanical enjoyment so standard clutch and stick will do.
