Last I looked into this (I think micron was looking into it also?) these were the major problems: 1. Orders of magnitude slower than normal memory. 2. Could b

Last I looked into this (I think micron was looking into it also?) these were the major problems: 1. Orders of magnitude slower than normal memory. 2. Could be easily damaged relative to current technology. 3. Requires orders of magnitude more energy than standard storage media. 3. Is currently far more expensive than standard storage media as well. And unfortunately, due to the fundamental nature of the storage media, I don't know if the orders of magnitudes jumps that we're used to with conventional storage/ memory technology will be possible here. So the only real advantage is density, but if it's going to be used as cold storage anyways, does anyone really care compared to tape? And is this ultimately more promising than atoms on a surface (e.g. like IBM millipede)?