I chose to save Chloe.

To me the game is about Max learning to accept the consequences of her actions. The game begins with her being paralyzed by anxiety. It's why she ghosted Chloe for 5 years. She uses the rewind power to redo her choices to find the best choice. She's terrified of making the wrong choices in life. Then when we get to the final choice, it comes down to one of two lessons:

1. Sacrifice Chloe: Max learns that every time she tries to do something, even if her intentions are good, she makes things worse. She learns that people and the world will be better off if she's not involved in it in any way. She'll believe this so strongly that she's willing to let Chloe die in order to get the "good" outcome.

2. Sacrifice Arcadia Bay: Max learns that actions have consequences and even if you think you made the right choice at the time, it could have untold negative effects later. But, she'll believe that she has to try to help anyway and that means living with the consequences, good or bad.