I was told, that at nanoscale high pressures in the gigapascal range are attainable somewhat easily by a friend of mine working here: https://tu-dresden.de/ing/elektrotechnik/ihm/NEM/die-profess... so maybe this form of nitrogen could be in special nano-islands or something like that. I guess, it is important to understand the physics of the materials to a certain degree and then think about engineering. This research is clearly at the beginning of the first phase, so they maybe found some interesting properties that could be useful in electronics but that's about it.