I'm still repairing a few CITV Gen 1 systems so there are a lot still in the field. The Marines have quite a few Gen 1s in their M1 s. I don't think there is enough improvement in the display to justify the cost of converting to Gen 2. Plus Gen 1 is more hardened than 2. But to the point, if there were many weak spots, there would have been more killed than has been.
“War is an ugly thing but not the ugliest of things; the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse.” —John Stuart Mill