Again, stop.
The Chinese Epic Tech Lead already debunked this.
The higher speed of PS5 SSD is not necessary to run it the way you saw it.
A 970 Evo on PC or the XSX SSD (which will be even better) are more than enough today.
We're arguing about two different things.
UE5 does not require PS5's SSD speeds to run scaled versions of demos. I agree with that, which is what the Chinese Unreal Lead said based on the translation
Tim, however, said very specifically that the demo was optimized for PS5's SSD speeds, allowing them to display/stream in more detail than what current I/O limitations on the marker are bound by, and that the level of detail was only achievable by Sony's I/O solution.
"[The PS5] puts a vast amount of flash memory very, very close to the processor. So much that it really fundamentally changes the trade-offs that games can make and stream in. And that's absolutely critical to this kind of demo. This is not just a whole lot of polygons and memory. It's also a lot of polygons being loaded every frame as you walk around through the environment and this sort of detail you don't see in the world would absolutely not be possible at any scale without these breakthroughs that Sony's made."