The story of bankrobber Forrest Tucker “is, also, mostly true” according the opening scene. The ‘mostly’ probably refers to the fact that the story we get told is pretty rose-tinted. Apparently Robert Redford is hanging up his acting hat, and The Old Man & The Gun is his final role, so if we take the movie to serve as a vehicle for Bob’s last hurrah then this rose-tintedness may be forgiven. Actually, knowing it’s to be Redford’s last makes the entire movie a bit more worthwhile.
It has been a long while since there has been a science fiction movie with this level of grand ambitions. The Director, Christopher Nolan, lists various movies that have inspired him for Interstellar, including Metropolis, 2001: A Space Odyssey and Blade Runner. For me the more obvious comparison however is with Contact.