It’s a perfect digitization of D&D 5th edition - it’s like having an automatic dungeon master using the rules and regulations we’ve been playing with on paper for ages.
It has a massive plot that can vary wildly on playthroughs depending on how rolls go, just like the real version.
It’s four-player co-op with PVE in an age where cooperation is increasingly rare outside of competitive team games.
It’s a well designed, properly built, finished product that can be expanded on with DLC, rather than using them to address core gameplay issues. (looking at you Paradox)