This is one of the aspects of the finale that I loved the most. Everyone lives but we have no idea what becomes of them. Everyone was left at moments of extraordinary emotional crisis / change / insight, too, which also heightens our sense that there is so much more to see and learn about them. It was brilliant, and honestly the only way to end this series in a way that would satisfy all viewers.

Though I have seen a surprising amount of online grumbling that the Jennings weren't killed because they deserved to 'pay' for all the horrible things they did. I've seen people comment that 'just' losing their children forever wasn't enough punishment. When I see these sorts of comments, I have to wonder if I was watching a different version of the show from them. Dying would have been easy for the Jennings. Losing their children plus the only lives they've known since they were kids, plus losing their mission, plus returning to a country they have seen for decades, plus now facing danger from hardliner purists in the KGB, etc. All so much worse than being shot by the FBI. Every one of these characters has been left alive but emotionally devastated and their lives will never be the same. That is so much worse than going down in a hail of bullets.