Well, with the immense replay value of the entire X-Series, not to mention all the available mods, I know I have literally DECADES of space-sim fun on my computer now.
I look forward to what Egosoft puts out next. I am impressed with them, rather, as a development company.
---perhaps a sub-sim?

LOLz -- [joke] i know they won't -- -- intersting side note is how similar spaceships and submarines really are.

I do indeed intend to try the X-Tended mods (there's a version for both Reunion and Terran Conflict, no?) ... but not until I've played vanilla for a career or two. Certainly I'll archive them for future use.