[Joseph is quiet, considering this carefully. Even without most of the context, he can imagine his older self taking issue with the fact that Jotaro and his parents aren't in America. Especially if whatever he ends up doing after saving the world makes him too busy to travel.]

Given our family history, I can assume the world trip wasn't a fun vacation. There's always something. [His tone softens, and he looks visibly uncomfortable with the moment of sincerity.] I guess I can't expect us to be best friends, but... you seem like you grew up well.