Better SSD's are available and not supported in gaming.The SSD nonsense remind me of salepeople overselling one feature of their product as it was the only thing slightly better than others, while ignoring all the other features worse than the competition.
Everyone using SSD, & better SSD will/is available already, & the differences are not drastic, best in class or not. There is a reason why PC gamers spend Money on better GPU/CPU, & not "best in class" SSD. Because these are bang for bucks where you get best performance. there is a reason when we PC gamers compare spec, we NEVER talk about how fast our SSD is.
No consumer gaming device has a faster I/O than PS5.
Play PS5 ONLY games in person and see how unmatched they are.