If you read the details of the article, there's some pretty open questions about whether Xpoint is 3x the endurance of NAND, or even higher duration than NAND.

And the latency improvement seems to be 2x, not the 10x you claim, or the 1000x Intel originally claimed. (Intel's own numbers compare 20ms for flash versus 10ms for XPoint...) Which isn't nothing, to be sure, but...