> you can use it to run any Linux kernel and and software of your choice purely from RAM
As I said: sometimes you just want to run 1 app as root, not replace the kernel. Also, good luck getting a usable device with your own kernel/software when chip manufacturers don't provide drivers: unless you don't mind the usual litany of XDA caveats ("N0irROM v.0.4. Not working: Camera, GPS, Hardware acceleration. new: mic now working, randomly reboots less often")