In addition, many iterations of those systems allow cabin crews to take control of all windows. Imagine the system failing enroute, and good luck getting an electronic tech to fix it. Curtain or shade n/g I can switch seats, system down and the whole car is screwed. Shades/blinds are much simpler. The fanatical obsession with weight reduction in airplane mfr is not a railcar thing.The stuff used for 787 windows takes forever to change from one setting to another. While that may be suitable for a building it is not suitable for a moving vehicle where you pretty much want the window shade state to change instantaneously when you want. The scene you thought you wanted to see and photograph would be long gone by the time the shade changes state from blocked to clear, and even then there are distortions that remain. On many occasions I found myself punching the stupid button to try to get it to move faster while the mountain I was trying to photograph below passed away out of site and the window was still not clear of the weird blue/purple tint of various opacity. Terrible thing to have on a moving train IMHO.