The healthiness of air fryer sausage depends on a couple of things. First, it depends on the type of sausage you're using - for example, leaner sausages will generally be healthier than those high in fat. Second, it also depends on your personal health goals and preferences - some people might prefer to avoid processed meats even if they are lower in fat. In contrast, others might not mind the occasional indulgence. If you're concerned about calories or fat content, be sure to check the labels on the sausage before cooking.