You should NOT use writable FS (except for a specialized one on a separate partition/device for user settigs) even with EMMC! And then you don't need battery ba

You should NOT use writable FS (except for a specialized one on a separate partition/device for user settigs) even with EMMC! And then you don't need battery backup. Using writable rootfs goes against industry practices and is a disaster waiting to happen... like the one with emmc in Tesla's central panels.