Surprisingly enough, Samsung was not among the first companies to introduce the PCIe 4.0 standard for its popular 900-series NVMe SSDs last year. However, this year, with the announcement of the 980 Pro models, the South Korean giant finally acknowledges the real market demand for speedier storage solutions.
https://www.notebookcheck.net/Samsung-finally-adopts-PCIe-4-0-standard-for-its-latest-980-Pro-NVMe-SSDs.449802.0.html