we may currently struggle to figure out why World of Warcraft might need to forever remember a user’s exact footprints in fresh snow, but odds are some designer will eventually figure out the answer and not long after, it will become a core feature of many games. Until then, the virtual worlds most in need of persistence are likely those based around virtual real estate, or tied to physical spaces. For example, we expect that “digital twins” should be frequently updated to reflect changes to their real-world counterpart, and that virtual-only real estate platforms would not “forget” about new
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