Things in the world change according to player decisions and their indecisions. When it comes to roleplaying games, every game must be unique. Not simply because of changing variables like time, snacks, players, and social distancing; but because of the way in which different players interact with dynamic consistencies, as I like to call them, and the chain of events they set in motion.
Improvisation Fuel
Long-term Campaigns: How to Prep Your World for the Long-Haul
One of the greatest things about D&D is the ability to adventure with your friends. It provides a safe environment for you and your friends to explore a world (or multiple) and all from the comfort zone. In addition, D&D gives us the ability to play in a setting for an undisclosed amount of time. Those features are what attract many to the open-world MMORPG genre.