You can’t see anything but the lights on certain points of interest, and it’s super easy to get lost. But the dust itself obscures your vision and even kills your map waypoints.
It makes sense, and you can find ways to replenish it in a pinch. To get through it, you need an oxygen tank, and obviously there’s a countdown for how long you can use it. Much of the map in Metal Gear Survive is covered in Dust, a poisonous substance. Animals I could hunt rarely spawned on the map, and I would often starve to death on the way back from a mission after not encountering a single bit of food on the way. In Metal Gear Survive, I felt at the mercy of forces I didn’t understand.
In a game like Don’t Starve, I understand my objectives clearly, and the game gives me ways to get what I need to scrape by, leaving the rest up to strategy and a little bit of luck. Food sources are bizarrely scarce, you don’t gain the ability to clean water until hours into the game (which is quiet and easy to miss), and information on how things work and what you should expect is never as clear or accessible as it should be. Instead, it’s a constant struggle between surviving, getting to the next objective, and not ever having sufficient information.