Interesting ideas...
I have a very different take on it though. Before I comment on this further, though, I will mention that there is a pretty cool, long-running thread where we dissected this subject pretty well to the bone:
https://www.dmt-nexus.me...;t=12511&find=unread Until you get full privileges here, you may not be able to post there, but you can still read our lengthy debates on the subject, and much of what you are opening up here was covered there.
You bring up the idea of death as equivalent with enlightenment, and I have heard people go down that road before... As Albert said, it is rather unlikely that you will find someone who has fully died to report back to you on it.
Near-Death Exeriences, though seem to suggest some measure of enlightenment might be involved, but who knows? Those people could just be experiencing a mad rush of neurotransmitters and DMT. There have been many people who have ostensibly died for fairly significant amounts of time and then managed to come back. I don't know how long you need to be dead for to distinguish yourself as being ressurected rather than simply having had a NDE.
My basic feeling on that is that we have no evidence to suggest that we are not already dead, or that there is even such a thing as being alive in the first place.
"The worst mistake that you can make is to think you're alive when really you're asleep in life's waiting room." Guy Forsyth
What we can say is that we have had tons of dreams, and we emerge from them into states that seem real enough, but are impossible to prove are not also dreams... only to eventually pass out and enter further dreamworlds that
seem real enough to us no matter how obviously fake they seem upon our transcending them.
The fact that we have these dream experiences dozens or more times every night, but have never once been able to prove that we actually are really alive in a material creature with a lifespan way... suggests that we at least consider the possibility that this world is also a type of dream. It may be more stable than most, and seems to have consistent timelines and laws of nature... but we can not trust our senses or memory in dreams so who can say for sure. Our memories are perfectly capable of morphing to fit whatever odd situations we find ourselves in so that it all seems to fit very well in our
current world concept.
The big hiccup in this unconscious acceptance of dreams is what we call
lucidity.
As a regular lucid dreamer, I can say that becoming lucid in a dream is basically what I imagine enlightenment to be. We recognize the illusory nature of our surroundings, reintegrate lost elements of our sense of self so that we emerge into an effulgent Self (big S), we recognize that we are creating and maintaining the dreamworld around us, and we can do what we want within this world... or we can leave it and go anywhere else we want.
This is the case with becoming fully lucid anyway. Lesser lucid states include just the awareness that you are dreaming with no major transcendence, and various degrees of power over a dreamworld that one might have more or less ability to pierce. These lesser states could be akin to what are described in Eastern texts as satoris, siddhis, and perhaps even samadhi.
I have experienced plenty of states that resemble the descriptions of various minor and major kinds of enlightenment... both with and without psychedelics. But personally, I reserve the term enlightenment for that basically permanent shift in consciousness that means you
never fall back asleep.
Well, that's my 2c. Have at it.

HF
"Curiouser and curiouser..." ~ Alice
"Do not believe in anything simply because you have heard it. Do not believe in anything simply because it is spoken and rumored by many. Do not believe in anything simply because it is found written in your religious books. Do not believe in anything merely on the authority of your teachers and elders. Do not believe in traditions because they have been handed down for many generations. But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it." ~ Buddha