Also they call it their "first" major expansion so I'm assuming they'll be more?
If they keep updating it then Starfield would be a game I would likely keep returning to for years.
I saw people suggest for a survival mode they add having to eat, drink, sleep, etc. But also making the environment effects more extreme and the fuel stuff more extreme too, such as you need to actually build outposts with fuelling stations and refuel to keep making jumps or you could get stranded in space, stuff like that, not my kind of thing but it would be worth going all out in a survival mode I think.