Delays, delays...
The more I read about 'delays' with XPoint, the more I feel Intel and Micron's initial announcement in 2015 was a bluff of sorts to try and steal the game from the likes of Nantero and their NRAM. I reckon Intel are trying to tie up the various vendors into their tech as much as possible, hoping that any competing NVDIMM tech will have a harder time getting adopted.