Easiest way to think about this is Cap8 armour isn't -quite- feasible for mass production yet. Meaning each piece of it has to be painstakingly, over a long period of time, and most importantly expensively created. Think of carbon nano-tubes we can make them, but we can't really mass produce the things yet. And selling of them a few years ago was impossible due to the high cost to manufacture them.
Just imagine one of the processes is experimental and involves lots of science.