Hopefully at very least the NRM will save an example of an NX pannel. Can't see the preserved railways doing much in terms of modern signalling. As for stock, hopefully some modern stuff will be saved when withdrawn. I'm sure the EMUs will go the same way as the early stuff though, with just the odd static coach saved (not even like they can be used as hauled stock unlike the earlier EMUs). Complexity is a big problem when it comes to all modern transport preservation, what with all the electronics. Even back to the 70s and 80s you are getting a lot of printed circuit boards and even chips, not the sort of things you bash up in a workshop. Modern stuff is harder to cold store too, yet warm storage is expensive. Air suspension bags and air-conditioning are particular problems, the former tends to crack and leak in storage (like road vehicle tires when standing for long periods, or my bike as I found out when I went to use it having not ridden it for over a year) the latter needs running regularly to ventilate the vehicle. Another problem is the finite amount of space and resources for preservation. Unless older stuff is scrapped or mothballed, where does the space come from to keep new units and where does the money come from to operate and preserve them?