Let's look back. It's early 2017. Sony is designing the next Playstation. They are outselling Xbox by more than 2:1 and Wii U is dying a slow death, Switch is about to launch. With basically Android mobile specs. Do you try to repeat your success? Of course you do. And that 399 price point was how you got there. You decide to keep it. You know that Microsoft plans to release their "Pro" console later in the year. That makes it highly unlikely that they can do a next gen launch just two years later. And you promised already that this generation won't take as long as the last one did, when it was seven years for PS3. So six years it is. A launch in late 2019 is planned and despite trying to hold that 399 price point, Cerny goes all-in. By using the RDNA architecure that is supposed to launch in early 2019 you make sure that you have state of the art AMD hardware. An 8 TF APU is basically top tier, you bundle it with a Zen 2 CPU. All is good. Then in 2018 it becomes obvious that RDNA is delayed. Will you be able to get enough chips for a console launch? Things get ugly. But you keep your focus, it will work out.
Then in March Microsoft shows DXR. Raytracing. No hardware exists yet. But could they be planning to use raytracing in their next Xbox? That would put PS5 at a huge disadvantage. You are worried. Then the RTX cards come out and they are prohibitively expensive. You exhale. 2019 it is. Enter 2019. A leak comes out and nails what you have. And it talks about raytracing in Microsofts console. And not only that, it talks about a more powerful SKU and a cheaper SKU. You are scared. The core gamers are very profitable and the mass market is equally important. Microsoft seems to eat away at your install base from both sides. And they have raytracing.
It is then decided to delay the 2019 launch to 2020, to spend the time on creating your own raytracing solution and to narrow the gap to Xbox while doing so. In mid 2019 you test your first iteration of this upraded APU. It needs to run hot, because there simply isn't enough time for a full redesign. And you don't want to go from a one year lead over Microsoft to trailing them by one year. You remember how that worked in the PS3 generation. It has to be 2020, no matter what. You join forces with a tech startup called LocalRay that specializes in software based raytracing by running on GPU hardware shaders. It's not a one way relationship, you give them access to your IP and they show of Spider-Man with their technology at Siggraph 2019.
But things don't go according to plan. The device runs too hot and the raytracing co-processor that is based on a repurposed PS4 Pro GPU requires several iterations of the APU. And then a spike in DRAM and NAND pricing because of issues at your provider Samsung in November 2019 and January 2020 leads to a sharp increase in cost. You can't hold your 399 price point anymore. You have to launch a weaker console at 499 while you know that Microsoft will do a 180 and launch for 399. You are screwed.