Phase change memory, resistive RAM... what have they all got in common? That process called 'forming', i.e. zapping the device with a high voltage to create the conductive path, just like a lightning strike. Unless something remarkable has happened since the 1980's when I worked on this stuff, it never was reliable/manufacturable, and never will be.
I would be more than happy to be proven wrong by someone actually selling NVM using this technology, sadly all I see is research papers claiming that it's the 'next generation'.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.