Playing open-world games solely for the main plot can feel entirely different from trying to complete every single side quest. In many cases, completing an open-world game to the fullest can take players over 100 hours, while sticking to just the story provides a much shorter and more focused experience. It depends on how well the game engages players, making them want to explore everything it has to offer and pursue every small unfinished task, or leading them to try just the first few quests to know what to expect and lose interest in pursuing side activities.