When we realize that FreeSpace shouldn't only be set in space is when FreeSpace becomes the Savior of Space Sims. A space sim that also includes atmospheric dogfights is something that the genre needs. We keep saying that FreeSpace 3 could be an economic risk because only the niche would play it, but aerial dogfighting games are something that gamers today still play.
The question is not whether it's going to be economically feasible but rather if we'll accept it as a space sim. I believe that as long as there are enough space missions, it will, indeed, be a space sim. Another concern might be that introducing Freespace with aerial dogfights may lead FreeSpace into a wretched path that spawns inferior sequels that satisfies not the original fans, but the new ones that play for the aerial missions, which may turn FreeSpace air-based. But without a FreeSpace 3, we can't even get to that point. Even then, we shouldn't be afraid of that, because if the next FreeSpace meets our expectations, then that should be enough. If a FreeSpace 3 turns out to be a bad game, we can at least shamelessly declare that FreeSpace 3 does exist.
We all say that space sims are dead. It might be, although recently, there has been a surge of space trading games and at least one engine. But what happens when a FreeSpace 3 becomes a reality? Someone on the forum compared FreeSpace's gameplay to Ace Combat's. As paradoxic as it sounds, I think that if there was a Savior of Space Sims, it would need to have planetary engagements.