@Christoffer wrote a story where it turned out that sleep was actually death. Consciousness doesn't survive, a new one is born every morning, with memory intact. This bothered me, I think because if seems like a distinction without a difference. So what if I "die" every night? What if every hour, or every second, I "die". What would be the observable consequence? There would be none at all. And so if there is no observable consequence from this distinction, shouldn't we discard the distinction? — hypericin

There may be no observable consequence for you, but it isn't a distinction without a difference. If sleep brings death, and the next day brings a new, replacement self, then you won't "'die' every night".

Far from it. You'll only die once - tonight. Today will be the first day of "your" life, and also the last day. Today will be the day you die, and bedtime (assuming you don't take a nap in the meantime) will be the date and time of your permadeath. Yes, you may not know any difference since "you" won't be around to reflect on the matter at a later stage, but then that's true of normal death (assuming for the sake of argument that death equals oblivion).

It's a distinction with a pretty big difference to me!