I asked if you thought: “ Drugs obviate the need for sleep. ”
and you replied:
“ I thought you meant being too awake,
as in having been drinking a little too much coffee,
not as being awake for a too long period of time.

One of the purposes by sleeping might be to
recharge the amount of neurotransmitter you spent while being awake,

but another purpose is to process
the information you accumulated while being awake, and I don't think
drugs can obviate the need to process your unconsciousness. ”.

OK, I agree with that,
but “ how awake I should be ” depends on my objectives.

Like most computer programmers, I keep long days when in hot pursuit;
in fact, my “ day ” ( sleep plus waking ) is never 24 hours long.

Sometimes my days are 30 hours long, but usually they're ~24.5 hours;
i.e. I wake up later each day, sometimes much later.