system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars VII] Why aren't the wrecked Star Destroyers entirely salvaged?
gpt
Most of the useful stuff is. Hull plating and duct work aren't that valuable, but functioning electronics and power systems can at least be worth some modicum of effort. 

What you see is, for the most part, just the skeleton with all the worthwhile bits torn out.