30 years on and people still seem to be confused by the terms ROM, soft kicking and the WCS?!? You'd think this was an Atari forum! :-)
..and the WCS is not write only. You can easily dump Kickstart on an Amiga 100 and use the WCS memory for something else. Many demos and emulators did this including Amax. If I remember correctly, Simon Douglas (author of Amax), wrote a great article on dumping Kickstart and using the memory for other purposes. Maybe in Amazing Computing? I think he even had some source code examples.
-P