4. He Doesnt Share His Arc Reactor
It isnt cost effective. Stark industries havent had a breakthrough in 30 years. It was only made to shut the hippies up, after all. Arc reactor technology appears to have reached its maximum potential. Luckily Tony Stark created a miniaturised one in a cave out of a box of scraps that keeps him alive and powers his Iron Man suit. So what does he do with this new technology? Nothing. The arc reactors only use is for Starks personal use. Despite the fact that the best scientific minds in his own company claiming the technology is impossible, Stark managed to make something that could keep him alive for fifty lifetimes small enough to store it in his chest. Then again, how many real world applications can there really be for an almost perpetual source of energy thats the size of a baseball? Once Stark replaces his old model for a new one (perhaps considering that fifty lifetimes just isnt enough) he gives Pepper the old model and tells her to destroy it. Its not like hes going to use it later or it has any other potential uses anyway. Luckily Pepper
does find a use for the miniaturised arc reactor, turning it into a plaque (theres that ego again).