Got all the endings and this game is definitely incredible. As a person with depression/anxiety myself I see the hiker story as a metaphor of depression and how psychologically troubled people keep hurting themselves and people around them, trapped in a tragic illusion that they would have no way out of their despair. I feel so much empathy regarding this part. The driver's story is also a good take on moral righteousness to the point of scariness.
[spoiler]
I love the three endings when he tore off his seemingly kind-hearted exterior and killed the hiker. I always have a thing for killers who think they are doing justice and the tip of religious element in this makes the driver's character much more interesting as well.
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Also
[spoiler, and Puella Magi Madoka Magica spoilers too]
The "Nurture" ending is so amazing. Reminds me of the episode in Madoka when Madoka cured Homura with her last Grief Seed and asked her to go back in time to save both of them. This ending has the same powerfully tragic charm as the Madoka scene but putting this scene at the end of the game (instead of as a trigger of the entire series like Madoka did) and leaving a ray of hope for both of them makes it absolutely moving. Genius writing indeed.
[spoiler ended]
Overall, magnificent game and I will definitely recommend it to anyone interested!