When a person dies, not all of the cells in the body 'blink out' at once.

I've never died, but I imagine that a near-death person with 80, 60, 40, or 20 percent brain cell function is still in possession of qualia - lived experience of some sort.

I also imagine that this experience is diminished and likely otherworldly when compared to my normal goings on.

Finally, I imagine that this qualia 'fade to approximate black' as the living cell count trends to zero.

These neural-replacement thought experiments have never been convincing to me. What's proposed is that my brain dies - piecewise - and a new mecha-brain is born, piecewise. The period of interop between meat-me and mecha-me leaves me no less dead at the end, and only slightly less "partially dead" than in the normal death process ("more alive", or at least, "less bizarre" because my remaining living cells are receiving coherent inputs rather than random noise / silence).

Note that I'm not engaged in meat chauvinism here - I don't deny the potential consciousness of the mecha-me, but it's a different consciousness than mine.

Is your consciousness now the same as the version of you that wakes up tomorrow?