Two of the major issues some people had with the original PS4 were the awful WiFi card and use of the outdated SATA 2.0. Sony has already stated the new PS4 models (Slim and Pro) have updated AC WiFi cards to allow for 5 GHz and better range. However, the firm has been relatively tight-lipped on whether it would upgrade the SATA Interface on the yet to be released PS4 Pro.
SATA 2.0 maxes out at around 300 MB/second while the SATA 3.0 on the other hand doubles that for 600MB/s. For a company that allows and encourages people to swap out the stock hard drive for larger storage, the use of this old tech was most likely a cost cutting move. At the time PS4 came out, solid state hard drives – or SSD’s – were too expensive to justify an upgrade. Mainly because they cost as much as the system for any size over 120GB.