During the show's run -- particularly in the first season -- there were a number of fan theories floating around. The essence of them could be summarized as:
i. The island was a real, but supernatural place. (I guess this is closest to what the writers eventually said it was, although it was presented in a more sci-fi way.)
ii. The island was a collective or individual dying experience, or purgatory of some sort. (Popular almost from the first ep.)
ii. The island was of alien origin and their adventures were all part of some cosmic experiment. (I favoured this one.)
iv. The island was some sort of military/government Matrix/VR experiment.
Did anyone ever read or encounter some other theory/explanation that isn't covered under these broad categories? Any interesting variations?
Any island that can disconnect from a seabed floor and time/space jump without some major seismic and oceanographic consequences is a miracle indeed...
... which leads to...
any subterranean river of gold light that can disconnect from its source to travel with the above island is magic too. There should have been an expanding cloud of piss-coloured water left in the ocean where the island was.
That whole bit was the weakest concept in the series. It led me to think that the island was artificial.
Even the showrunners acknowledged the stupidity of this idea in their epilogue for the series when Linus is asked directly: "How can an island move?" and he dodges the answer. He should have just replied: "Miracles!"
If you go by the show, it was something like purgatory. If you go by the showrunners retconning things after it ended, it was real, whatever that means. I think they got so far up their own asses they forgot the story.
In S3 (edit) they all but tell the audience that everyone died in the plane crash. I think there was a disconnect between the showrunners, writers, producers, actors, and the story that was told. It did meander a lot. TV series that big are collaborations between thousands of people, some with lots of influence, some with just a little, but the end product is not one person's vision which makes different interpretations valid.
I think S3 is when they find out the plain died with all of them onboard. Another big clue was Christian Shephard getting out of his coffin and roaming the jungle. Ben telling them that no one can leave the island. Later they rewrote to say that Widmore bought a plane of dead people, towed into the ocean and sank it to fake their deaths to protect the island which made no sense.
You have to admit though that no matter what explanation they came up with, it was going to piss off a lot of people. I can't think of any ending that could have lived up the expectations set up by the series.
I always wonder if ABC pressured them to leave the door open for more seasons, hence, the reason so many of the mysteries were left unanswered. Unfortunately, that lazy season 6 and that awful schmaltzy finale completely trivialized all that had gone before it.
I always got a chuckle from that final conversation between dead-Jack and dead-Christian: "The most important part of your life is the time you spent with these people... blah, blah, blah." I would have thought the most important part of his life was the time he superman-punched MIB and saved the ENTIRE DAMN HUMAN RACE. Surely that deserved a mention and a high-five. :D
The flaccid/weepy conclusion killed a lot of the good will among the fans to the point where most of us couldn't care less about a re-boot/sequel/whatever you want to call it.
If I had been the showrunner, I would have ditched Season 6 and tweaked the ending of Season 5 a bit. Subsequent series would be one season stand-alone stories with different casts, but all centred around the Island.
That's why explanations are dumb. Let the audience have their own interpretations, that's part of art. But you also mention the ending, which was fantastic and among the best endings I've ever seen, maybe THE best. Granted, many shows get no ending or poor endings but the Lost ending ties into the purgatory theme and although it doesn't answer every question, overall fits with the show and makes sense within that universe. And the ending was well received at the time. The morning after the internet was awash with mostly positive articles although many criticized it for not tying up every loose end, but since the storyline meandered there was was never any chance it would all get wrapped into a pretty package. I could say, "it wasn't perfect," or "it was flawed," but that's dumb too because every show is flawed. It is what it is, which overall was pretty damn good, and sometimes that's the best you can get.
"The morning after the internet was awash with mostly positive articles..."
I have a theory about that...
Any good will that ending did generate I think had a lot to do with Michael Giacchino. I've always said that the showrunners should have kissed his ass, because it was his moving soundtrack that largely sold that ending. Hell, even I teared up a bit.
Once people calmed down a bit, they started to look at it more critically. Now LOST is largely dismissed by former fans and the popular media.
Since it's ending, LOST has come to be regarded as something of a punchline for jokes. Most recently, for example, the producers of This is Us said that they wouldn't be 'pulling a LOST' when it came to revealing the fate of Jack's death.
Anything that smacks of LOST-ness is roundly ignored by viewers. Most recently the series The Crossing was advertised as being from 'the network that brought you LOST'. Big mistake linking it to LOST. Viewers stayed away and it was cancelled after less than a season. If you go over to that forum, you'll see that a lot of us ignored it BECAUSE of that association with LOST. No one wanted to get burned again.
ABC, Lindeloff and Cruse have periodically talked about LOST sequels and the news always generates zero interest or enthusiasm.
I didn't watch The Crossing, (some religious/aliens thing?) barely saw it marketed anywhere, but nothing is cancelled because of a trailer. You almost had me going but overplayed it.