Depends what is meant by sensory overload. I often feel overloaded by my surroundings, but hardly ever to the point where I absolutely have to escape. I don't like being in crowds but I can cope with them if there's a good reason. Background noises can mess up my concentration, which was a problem when I was working (noisy teenagers), and I would usually leave the room so that I'd be able to think coherently about my work, but I don't think I'd have died if I hadn't left, I'd just have been uncomfortable, angry, and unable to work effectively. I have a strong sense of entitlement to reasonable comfort, so I've usually got shut of the sensory issue before it's had a chance to really upset me, so I've never really put my vulnerability to a strong, sustained test.