The problem is that Optane wasn't better than the other NV-DIMMs that came to market. It's easy enough to build an NV-DIMM based on DRAM with some buffers that

The problem is that Optane wasn't better than the other NV-DIMMs that came to market. It's easy enough to build an NV-DIMM based on DRAM with some buffers that dumps to flash when the power fails, which ends up being cheaper and easier than Optane memory based DIMMs due to the required error correction and wear leveling. It is quite likely that persistent memory will make its way into general purpose computers in the future, as the difficulty in scaling DRAM increases as cell sizes decrease. Capacitors can only be made so small before they don't store enough charge to overcome thermal noise. In theory Optane was supposed to be better at smaller feature sizes, but it never got to that point. We'll have to see if MRAM or NRAM can make it in the coming years.