ML applications face a frightening problem of diminishing returns on investment. The first prototype often happens in days or weeks, the next iteration months,

ML applications face a frightening problem of diminishing returns on investment. The first prototype often happens in days or weeks, the next iteration months, after that years. It's more analogous to clearing a foundation for a house by progressively picking up the boulders, then the rocks, then the grains of sand one at a time.