> And SATA SSDs do make sense, they are significantly more cost effective than NVMe

That doesn't seem to be what the vendors think, and they're probably in a better position to know what's selling well and how much it costs to build.

We're probably reaching the point where the up-front costs of qualifying new NAND with old SATA SSD controllers and updating the firmware to properly manage the new NAND is a cost that cannot be recouped by a year or two of sales of an updated SATA SSD.

SATA SSDs are a technological dead end that's no longer economically important for consumer storage or large scale datacenter deployments. The one remaining niche you've pointed to (low-performance storage servers) is not a large enough market to sustain anything like the product ecosystem that existed a decade ago for SATA SSDs.