Why would you do that? To use precious SD storage to install yet another x86 OS to painfully slowly (10-20MB/s and huge latency) boot up another computer, that

Why would you do that? To use precious SD storage to install yet another x86 OS to painfully slowly (10-20MB/s and huge latency) boot up another computer, that in 99.99% of the cases already has an OS. And I don't think they implemented a shared storage between such a computer and the embedded one through the USB storage interface.