We use conditional disable symbols in our development apps for sharing code but with differences on RT and on PC. Some code has to be different on each platform even though much is shared. We also use them for debug code, enabling and disabling major components in our architecture, enabled and disabling unit test code that is only needed during unit tests, etc, etc. We also use a continuous integration server (jenkins) to alter the conditional symbols in memory to allow it to run custom simulation and unit test code instead of what runs otherwise in the real environment. They are also useful to activate code in development mode, over executable, because you often want different behavior for front panel objects, since they don't exist in RT, but might on the PC. Hope those give soem examples, they are the ways we use them for our apps.
