Another thing RAD was useful for, namely there is a reason you rebooted more often an Amiga that you'd reboot your modern laptop: due to lack of memory protecti

Another thing RAD was useful for, namely there is a reason you rebooted more often an Amiga that you'd reboot your modern laptop: due to lack of memory protection / virtual memory (due to the lack of a HW MMU) when an application crashed it brought down the whole OS (the (in)famous guru meditation failures). After rebooting the content of the RAD was still there (unless overwritten by a buggy program)