We can learn about the complexity of human relationships. The ending shows that even after a painful divorce, there can be a sense of respect and understanding. It also reflects on how love can transform into a different kind of connection, not romantic anymore but still with a certain level of care for each other.
From the ending of Marriage Story, we understand that life goes on. The characters are shown to be moving forward with their lives. There is a sense of closure, but not in a completely clean - cut way. It shows that the end of a marriage is like closing a chapter in a book, but the memories and experiences still shape who you are. And it also implies that there is always hope for new beginnings, even after the end of such an important relationship.
The ending of Marriage Story makes us realize that divorce doesn't have to be all about hatred. In the end, the two main characters seem to have come to terms with their new situation. They have let go of some of the anger and bitterness. It's like they have accepted that they are better off as individuals now, but they also don't completely cut off the bond they once had. It's a very nuanced portrayal of the end of a marriage.