>>4
IBM needs that bug to properly run the VM that runs the OS that runs the emulator that runs the interpreter to an ancient COBOL-dialect that feeds everything to a big block of binary data that was encoded from punch cards. If that system fails, then millions of
mission critical systems that ran
super important jobs would fail. Billions of pesos will be lost. Millions of people will die (probably you). Thus, compatibility must remain in place in perpetuity.