A typical use case for Forth to launch from bare metal (more like bare silicon) into the application on embedded systems or as the bootstrap mechanism/BIOS for a more advanced OS on a larger, perhaps desktop, system. A Forth console over a serial port can provide a user with tons of low and high level access to a system. I built a 12 processor "parallel" robotics controller back in the '80's using a bunch of Rockwell R65F11 Forth processors (6502's with Forth in ROM).