This article is talking about SATA SSDs, not HDDs. While the NVMe spec does allow for MVMe HDDs, it seems silly to waste even one PCIe lane on a HDD. SATA HDDs continue to make sense.
And I'm saying assuming that m.2 slots are sufficient to replace SATA is folly because it is only talking about SSDs.
And SATA SSDs do make sense, they are significantly more cost effective than NVMe and trivial to expand. Compare the simplicity, ease, and cost of building an array/pool of many disks comprised of either 2.5" SATA SSDs or M.2 NVMe and get back to me when you have a solution that can scale to 8, 14, or 60 disks as easily and cheaply as the SATA option can. There are many cases where the performance of SSDs going over ACHI (or SAS) is plenty and you don't need to pay the cost of going to full-on PCIe lanes per disk.
And I'm saying assuming that m.2 slots are sufficient to replace SATA is folly because it is only talking about SSDs.
And SATA SSDs do make sense, they are significantly more cost effective than NVMe and trivial to expand. Compare the simplicity, ease, and cost of building an array/pool of many disks comprised of either 2.5" SATA SSDs or M.2 NVMe and get back to me when you have a solution that can scale to 8, 14, or 60 disks as easily and cheaply as the SATA option can. There are many cases where the performance of SSDs going over ACHI (or SAS) is plenty and you don't need to pay the cost of going to full-on PCIe lanes per disk.