While SigPatches are a staple of the homebrew community, it is important to remember:
The release of firmware introduced minor system stability updates that broke previous versions of SigPatches. The "1.4.0" designation usually referred to the specific bundle update that aligned with Atmosphère 1.4.0 , ensuring that users who updated their system could maintain their homebrew functionality without "Unable to start software" errors. A Modern Note on Safety and Legality
: They allowed the system to launch unofficial software (NROs) directly from the home screen.