ThePCEnthusiast published a review on the WD Black SN850X NVMe SSD
A quote from the article:
After a few years, WD finally updated its flagship SSD. We are checking out the WD Black SN850X NVMe SSD, the 2TB capacity to be exact. The SN850X is an updated version of its predecessor, the SN850, that we reviewed a few years ago. It features a better and improved 8nm WD proprietary controller.WD Black SN850X NVMe SSD Review