Flush output on shutdown
When the system shuts down, it prints several according status messages. Most of the time, however, the system powers off before all data was actually transmitted (= all text printed printed).
It should be evaluated if and how flushing can be realized, so that final shutdown is postponed until all streams have been flushed. Since AMiRo-OS uses the generic BaseSequentialStream interface, the solution must be valid with this level of abstraction. Exploitation of the underlying hardware interfaces (e.g. UART) is no valid solution.