 If we think about the level of detail in a scene, it could be tempting to add a bunch of elements. Textures, animation, instructions. That can be a lot for the user to take in. It can also take a hit on performance. Not to mention adding UI, other users, scenery. So before you add visual complexity, make sure it's adding something to the experience. It will keep users from getting confused and make sure folks without the latest and greatest machines can also enjoy what you build.