Hey, I ported apt to Android 4.4 a while back and was hoping to eventually get to design it in a way that it would be a suitable backend for a third party app store that could also safely install core components and patches to phones that allowed it. My main goal was to eventually get Android split up into a collection of packages much like a modern Linux distribution in order to improve security and upgradeability. I'm glad to see termux is taking the first steps towards this :)