For users on exploitable firmware (9.00 and below are the most stable), "PKG download work" is mature but has caveats:
The phrase “PS4 PKG download work” encapsulates a cat-and-mouse game between Sony’s security engineers and the homebrew community. For every PKG that works, hundreds of users have bricked consoles, lost PSN access, or wasted hours on corrupted downloads. ps4 pkg download work
The PS4 uses files as its standard format for distributing installable content, including games, updates, DLC, and system firmware. This report outlines the standard (official) PKG download mechanism and contrasts it with the unofficial (exploit-based) method used for custom or backup content. For users on exploitable firmware (9