What is so fun about doing a random unplanned trip is the amount of divergents you create with each important decision.
A divergent is that other you that could have been had you made another choice. The experiences that that other you would have had and how that would shape his future in a different way than your current one. And how with some divergents you will eventually converge because regardless of the path you will catch each other, but with others you will never do.
Well it’s just fun to thought and image, nothing new there, only that is so much more constant due to the crazy travelling experiencing now. How some kinds of lives are prone to much divergence while in others you would never have them. Like the chaos of being in the middle of a storm or the immutability in the surface of the moon.