Maybe I'm being OCD, but I hate having incomplete contacts in my Inactive Contacts list.
It would be great for us completionists if there were a way to finish all those old contacts. I know that Ouroboros offers old missions, but the problem is that (as far as I know), Ouroboros only offers missions which award badges and/or souvenirs. Even then, (as far as I know), the updated contact relationship isn't saved on your list.
A possible solution would be for Ouroboros to allow us to search by both mission and contact name. I also heard that Thunderspy allows you to unlock old contacts manually when you speak to them.
Anyway, thanks for reading this!