If you have reliability and accuracy (big if) then the practical usability and cost become performance problems.
And this is a bit of a sliding scale. Of course users want the best possible answer. However, if they can get 80% (magic hand-wavey fakie number) of the best answer on one second instead of 20, that may be a worthwhile tradeoff.
And this is a bit of a sliding scale. Of course users want the best possible answer. However, if they can get 80% (magic hand-wavey fakie number) of the best answer on one second instead of 20, that may be a worthwhile tradeoff.