Intel is positioning Optane as a new magnetic drive cache but yeah, nobody cares about that. What is actually is is a new type of flash that offers pretty fast sequential reads (which doesn't really matter for most uses) and low read/write latencies (which does, but SSDs are already extremely fast for desktop use today).
Internally it fixes a lot of the problems inherent to NAND with write exhaustion and heavy write amplification. It doesn't need to be massively parallel or include a DRAM buffer to offer strong performance. All those "gotchas" that made the first 2-3 generations of NAND SSDs tricky (remember OCZ poison, fellas?) are not a concern. Of course modern SSD controllers worked around all those issues inherent to the NAND technology so there's no reason an enduser would care about that stuff.
As XPoint storage gets cheaper over the next couple of years it will probably replace NAND. And it should, it's simply better technology. But until then, it's a curiosity.