Earlier quoted context omitted.
Author here. A lot of these numbers are drawn from experience in the mining world, where people realized that when cost is the ultimate bottom line, a lot of corners can be cut. Sia systems don't need a ton of networking. I ran the networking buildout costs by some networking people, and again it comes down to cutting corners. If you only need 10 gbps per rack, if you don't mind having extra milliseconds added, etc,…
Here's the issue. We know that due to economy of scale and domain experience, AWS will always have the lowest cost (to Amazon) for storage -- whether that's totally-reliable storage, or sorta-reliable. If there was a demand for sorta-reliable, they'd build a sorta-reliable S3 and undercut you. Then, blockchain adds inefficiency. Therefore, it's basically impossible for any blockchain solution to have a lower total co…
E.g bandwidth costs on AWS are high enough that if you actually serve up lots of data from S3 you can typically afford to rent servers to cache all of it 'in front' of AWS and still save a ton of money.
S3 only gets close to competitive if you never access the data from outside of AWS.
Which gets to the point: If you use an AWS service like S3, you pretty much has to use other AWS services if you want the cost to be even somewhat reasonable in aggregate.
They don't need to compete on cost, because once they get you to buy into one set of services, moving any one set of services off AWS gets more painful and/or costly, and a full migration looks too scary for most people.
S3 will never be priced to undercut anything but big players for that reason. They need to be competitive with Google and Azure, because those guys can offer to offset transitioning costs and generally aggressively target AWS customers.
A small player isn't the same threat even if substantially cheaper.