Moffat may torture us w/ convoluted ontological paradoxes, but he seems to be a softie when it comes to killing off beloved characters. When he does, he tends to bring them back in some way. River and her crew were "saved." Clara, Rory, Amy, & the Doctor kept coming back. Amy & Rory got to live out their whole lives together before their final death. The father was saved in "The Doctor, the Widow, & the Wardrobe." It was even him who suggested that Jenny live in "The Doctor's Daughter."
This blows my mind because 11 is quoting River, remembering what she said to him the first time they met. And River only said it the first time to 10 because she remembers 11 saying it...it's just an endless circle of quoting each other