Comment by robwwilliams

There will not be “sleep in a pill”. Even the happiest of mitochondria and cells have been entrained for eons to circadian rhythms. (Even benthic deep sea fish sleep; well cyclic rest behavior.)

Long-distance drivers and pilots on long missions have their drugs of choice (e.g., Modafinil), but they are crutches, not replacements.

There is good evidence that fur seals, rays, and some sharks have brain asymmetry in sleep, with half the brain sleeping while the other half keeps an eye open.

Unihemispheric sleep! Convenient.

https://www.science.org/doi/10.1126/science.adf0566