I think nostalgia's inverted with Picard. Unlike The X-Files which basically took characters we know and put them back into the situation we remember, Picard is taking a character we know and saying 20 years have passed, everything's different, this is where he is now, and there's no going back to the way things were. We see the Enterprise-D, but it's something he can never go back to. He dreams about Data, but he's someone who's never coming back. He goes to Starfleet and they tell him to go home.