This is basically standard practice among the SSD industry. SSD manufacturers are allowed to get away with this because they post vague or misleading data sheets about their product, such as stating "up to X" speeds or lowballing their speeds in the data sheet so that when reviewers review the product, they see that their product exceeds the expectations laid out in their data sheet and get praised in return, and down the line they swap out parts with inferior ones that still meet the specifications within their data sheet. It is absolute bullshit, but almost every SSD manufacturer I can think of has been recorded doing this at this point. I believe SK Hynix might still be honest, but I could be forgetting something.