Related, I have seen one guy, over and over say "Why isn't Ukraine hitting Russian electric train transformer stations". I don't have a good answer, most of Russia's rail network is electric, transformers blow up easily, there are many of them, and they would be very slow to replace. Ukraine clearly has deep strike capabilities, and Russia cant defend every transformer. I don't think it's a humanitarian issue, or at this point even an issue with the US telling Ukraine they can't hit those targets.