True, but of course any latency introduced by a program is in addition to that brain lag. Even though the program can do work while the brain is processing, to

True, but of course any latency introduced by a program is in addition to that brain lag. Even though the program can do work while the brain is processing, to feel snappy it must let the brain begin that processing as soon as possible, i.e. respond as close as possible to instantaneously.