Probably for as long as he has spare cybernetic parts for replacements and is willing to continue being around, I’d guess. Or someone blows him, any backups, and his starport up.
Seo Jin-ae might still be around
I’d go as far as to say probably, unless some Thargoidian stuff around that happens… well, I suppose, she’d still be around then, just (most likely) not wherever humans are at.
Won’t miss him.
Assuming that, much like Seo, nothing extremely major happens around that plot arc, or at least no “death”(whatever meaning that term has when he already defied it once, and probably has backups of the backup laying around). I guess might have something going down with the Constructs, if those ever come into play anywhere. They’re probably for that next Elite game, though, unless they really want to surprise us.
the First Apostle might still be around. Or a First Apostle, anyway.
I’d even say very probable, since she was described as a young Imperial woman. Of course, there is also that chance of this getting covered further in the current story
somehow, but it will probably be Thargoid involvement of some sort.
The others? Yeah, I guess they’d be retired, no longer alive or approaching either, bar the younger Imperials.
I suppose there might be some consideration to be had for anyone affected by the Thargoids on a Titan, but so far no major character has received that treatment, and we don’t yet know where that’s going, exactly. Also assumes that whatever they might have done won’t have any deleterious side effects in the medium term…
Anyway, point remains that being 80 or so years doesn’t mean as much as it does in current day/21st century Earth.
