200 dollars to upgrade from 128gb to 256 and 400 to upgrade to 512gb. They are out of their mind but unfortunately so many people will be ripped off. Or they'll buy the 128gb version and end up running out of space in a year or two.
They do not use SATA 3 drives that tap out at 520MB/s Read and Write and can be picked up from Best Buy on Black Friday. They use custom NVMe blades that are getting 3.4GB/s Reads/2.2GB/s writes. They are not equivalent in the least.