>(b) there is no real industrial need--single-threaded programs can already do millions of things in time we consider imperceptible, so slow computation is usua

>(b) there is no real industrial need--single-threaded programs can already do millions of things in time we consider imperceptible, so slow computation is usually a software or network problem in the first place. Or a problem of the difference in retrieval speed between CPU cache and RAM -- let alone the HDD.