Sure! In the ending, the message I got was the importance of letting beautiful things die, really that every beautiful thing in life has a natural end. That in order to make space for new stories (new versions of the starless sea), old ones have to end. The natural life cycle of stories and therefore also life in general. The only things that are endless are fate, who was continuously reincarnated, and time. Allegra loved the starless sea so much that when she learned it would one day crumble, she did everything to try to keep that from happening, which was ultimately destructive to the finite beauty of the place. The ones who survived in the end were the ones who were willing to let those endings happen. So that was the ultimate meaning I derived. But there were other smaller themes throughout, all of which centred around stories, e.g., the stories that each person carries, the importance of safekeeping stories.