And WD Gold 12TB goes for about $520 / unit.

It used to be about 10X difference between HDD and SSD per TB pricing. Now the gap has widen quite a bit with NAND price going up.

Is the brand new 11 TB offering really representative of SSD $/GB?

As of a year and a half ago you could buy the Samsung PM1633a 15TB for $10k[0], or about 67¢/GB (slightly cheaper than the Micron unit linked, 70¢/GB). It's still available around the same price[1]. So I guess you're right.

The price I see advertised for the WD Gold 12TB is a bit higher[2], or about 5¢/GB. Still, more than 10x better value in terms of raw storage.

[0]: https://www.anandtech.com/show/10533/samsung-expands-its-pm1... [1]: https://www.cdw.com/shop/products/Samsung-PM1633a-MZILS15THM... [2]: https://www.cdw.com/shop/products/WD-Gold-Enterprise-Class-H...

Only if you buy the top of the line (by density) stuff. Go a bit lower and the pricing between HDD/SSD is closer than ever, though there's still a noticeable gap.

Thanks - that person commented after, and I appreciate it. Right now I don't have the cash, but I wish I did. That SSD is big enough to store the CommonCrawl text-only archive of the web (compressed). http://commoncrawl.org/the-data/get-started/