For sure, and nh1402 is working on sailfish and also posting things within this thread. Perhaps we need a separate thread for sailfish discussion to avoid confusion. Sure, but nspawn also handles virtual networking, whitelisting shared directories, and a bunch of other useful looking things without having to write any code at all. Since Android doesn't use systemd, there is no 'lock-in' from using nspawn, and it looks useful for exploratory hacking to get something working quickly.