Did 'Lost' Leave its Viewers Lost?

Multisource political news, world news, and entertainment news analysis by Newsy.com

I’m one of the people, who are still lost, in the last episode, of the recently concluded hit TV series, Lost.

One/1 reason is that, Jack is died in the flash-sideways timeline. And I check, it on Wikipedia and Lostpedia, that Jack is died/dead, in the flash-sideways timeline.

But my question/s to this idea are these.
* Are Jack and rest of the group really dead or died?
* How did Jack and rest of the group dead or died?
* If the flash-sideways timeline, is a type of purgatory, what if one or some of them, decided to “move on” and they decided to stay behind go back to the reality, and ready to die?

So far, these are my questions, although there are questions are still unanswered. Kakaloko intindihin.

Source:
Did 'Lost' Leave its Viewers Lost?