PS5 drives must also be pre-approved by Sony, supposedly due to strict hardware requirements, like 5.5GB/s[1] sustained bandwidth. I personally think it's silly, sure, bigger numbers mean better performance but I would be surprised if most games wouldn't work perfectly fine with a nowadays average SSD.
Ah no ps5 and xbox both have been designed for fast loading of game textures. Even the new nvidia and amd cards support the same so current games might be okay with slower drives but texture loading has been a bottleneck for 4k gaming which this solves.
[1] https://www.pushsquare.com/guides/which-ssd-drives-will-be-c...