So I got a crappy rk3318 tvbox with internal emmc probably bad soldered.
Since it stopped working, I booted it with the multitool, saw that erase mmc fails, but the terminal works.
GIven that I'm here to learn having fun, I gave a look at multitool and saw it generates a rootfs with a selection of debian packages.
So why not trying to reuse it pre-installing busybox, kodi, etc, then replace the menu with a proper init i.e. to start kodi standalone?
So my question: why the choice to use an NTFS as main partition? Just as an easy way to make it readable to most systems?