NVMe technology is slowly trickling down to more affordable SSDs. The WD Blue SN500 will performance faster than any other drive before it in its family while costing less than a high-end WD Black SSD.
https://www.notebookcheck.net/Western-Digital-launches-inexpensive-SN500-NVMe-SSD-for-the-masses.414501.0.html
Isn't the Intel SSD 660p a better value with better performance? x4 lanes, and about $200 for 2TB.