Digital computers are also expensive, require specialized knowledge and are difficult to maintain. In a lot (most?) cases the scales tip in favour of digital so

Digital computers are also expensive, require specialized knowledge and are difficult to maintain. In a lot (most?) cases the scales tip in favour of digital solutions, but that's not always the case. I'm not a specialist but I once saw here an analog computer stimulating a black hole using sound waves. Making a digital simulation would probably be less precise or a lot more expensive.