[Rickertsen2]

Does an OS necessarily have to complicate things? I would think some example/default code could be provided that runs in a single thread, follows the input->process->output paradigm and in general behaves in much the same way as the current system. If more advanced users want to explore the extended feature set an RTOS has to offer they may do so. If you look at a PC running windows it is extremely complex, but you can still write a "hello world" program without understanding the many levels of abstraction below you.