What makes people want to use a digital camera instead of buying a disposal camera?

Once you have a digital camera and a compatible memory chip, you can take almost countless pictures for no additional expense. As the memory chip fills up, you can upload it to a computer and then delete the files from the chip and keep taking more pictures without having to buy anything more. Disposable cameras have a limited number of pictures they can take on a strip of film. Often around 2 dozen pictures. When you have used up the film taking those few pictures, you need to buy another camera.