How have you reserved space for future instructions? Your first version has some instructions which don't have a specified discrete value, and are condition bas

How have you reserved space for future instructions? Your first version has some instructions which don't have a specified discrete value, and are condition based. Does this mean that programs written with this first draft will no longer function if the instruction set changes? What would happen if Radiohead were to suddenly remove all songs from Spotify? Would this break the applications?