As you might guess, this is intended for servers where capacity takes priority over everything else, including performance (the 500MB/sec is nothing to write home about). A data center could hold 100 petabytes of data in a single rack instead of needing large swaths of server room space. That's helpful for cloud services, AI and other technologies that may need massive amounts of data.
And then there's the cost. When the DC100 ships in the summer, it'll have pricing comparable to other business-grade SSDs "on a per terabyte basis." That likely means a price in the tens of thousands of dollars, which is enough to give pause even to those companies that can afford it. While the drive should be trustworthy enough, that's a lot of money (and a lot of data) to lose if one goes bad. Think of this more as a peek at the future of SSDs than anything else.