He opened his encrypted drive. He looked at Fossilize. Then he looked at his modded PS4, still running Demon’s Souls at 60fps.
The difference in CPU architecture is the first and most critical hurdle. A PS3 game is written in machine code for the Cell processor. The PS4 uses an x86 chip. They speak fundamentally different languages. ps3 to ps4 pkg converter
The modding community has been active on the PS4, with the development of jailbreaks for various firmware versions. However, even on a jailbroken console, you cannot simply convert and play any PS3 PKG file. He opened his encrypted drive