I'm willing to tack on to my caveat list that it can be possible for a brief period of time. Since we know that no sleep leads to death, and people have clearly done Uber for longer than that threshold and not died, it can clearly be done for a period of time and you stay alive.

It's just that there does not seem to be any hope of doing it indefinitely. Sad. My personal biases and desires, like many here, lead me towards really wishing it could be, but I just don't see the evidence.