You are right for small scale things. I'll have to double check my working out, but you're only paying for what you use, not provision, which is one big things

You are right for small scale things. I'll have to double check my working out, but you're only paying for what you use, not provision, which is one big things. Also, if you have > 3 machines working from the same dataset (ie docker image/video/large binaryblob) there is an instant saving, without factoring in provisioned vs useable space with EBS but, your original point, as a 1-1 replacement of a properly sized EBS mount, is correct, its more expensive.