Oh wow, you actually know Sony's exact ssd solution. Tell us a little bit more since you know its speed. Tell us also how hot it gets while streaming and how fast it is after 10 minutes of streaming...
Sony is leveraging AMD's technology, from that it becomes extremely easy.
If you know that there was a PC SSD available when the statement was made that was faster than whatever can possibly be in the PS5 explain it.
Earlier you said: "PCI-E 4.0 NVMe drives will theoretically top out at around 8GB/s of sequential reads, which is likely what the Playstation 5 will have"
"most SSD setups today top out at around 4GB/s thanks to PCI-E 3.0 bandwidth limitations."
So can you provide an example of an SSD available for PC's before April 16th with equal to or higher than 8GB/s sequential read?
Your points were RAID and PCI-E 4.0 x16, both of which have been shown to be irrelevant to the point made. After which you've just made vague statements. So just provide the actual evidence rather than saying "It's easy to work out".
It may be a vague marketing statement without much real substance, but unless you can actually show an SSD available for consumer PC's at the time the statement was made you can't call it a blatant lie.
Link a product.