Also from my understanding the game is open ended, meaning once you complete the final task you can keep roaming around. Bet that is when the forums will be flooded with the same people here not wanting respawns going "Am bored, make a new expansion" a week or so after release.
Unless I am mistaken, this was one of the questions during one of the Twitch TV sessions. And - if I remember correctly - it was said that the game has a fixed ending. Something needs to happen and afterwards the game is just over, so you cannot keep roaming around after you see the credits. (Which is, I think, quite logical because it is an RPG with a deep story line and not an endless survival game a la minecraft...)
