Your post is a fine example of faulty generalization and nonsense. You are trying to present that price point as available to everyone which is not even close in reality. Most people of the world do not have access to those prices and a single TB tends to cost ~100$ depending on where you live. With bandwidth it is much worse with the world average being 5.0 Mbps. I'm not sure how this exactly is relevant to the OP?
yeo and in 2-5 years a 4tb-6tb will be under $100.. so scalability is not an issue
Scalability is not about storage only.