First, it's essential to understand that macaroni salad is a perishable food item, which means it won't last forever. Generally, if stored properly in an airtight container at a refrigerator temperature of 40°F (4°C) or below, macaroni salad can last for 3 to 5 days. But, let's be real, have you ever had a container of macaroni salad that's been sitting in the fridge for a week, and you're like, "is it still good?"
Now, you might be thinking, what makes macaroni salad go bad in the first place? Well, it's usually the mayonnaise and dairy products that are the culprits, as they can spoil quickly if not stored properly. It's like when you leave a carton of milk out at room temperature for too long, and it starts to curdle and separate - not pretty!