What sort of life is Miss Justineau supposed to live now?
She has to spend the rest of her mortal life in that mobile car, airlocked. No friends, no family. All alone. No recreation. No enjoyments. No fun. She's basically in jail for life now, no?
The movie made it appear as if she's happy with her new spot, the way she is teaching the kids. But I don't see how that is convincing.