Well, there are also the trains, which admittedly look kinda crap, but do work as intended. The nuclear tree was added because I wanted to add even stronger fuel, but keep it balanced, so I went for plutonium. It probably is quite over the top though, to have added scientifically accurate recipes for everything..
Yes, I do intend to give the new materials a use once I have a bit more time on my hands. And hopefully I can also get around to fixing the trains and make them actually look nice.