Since the PS3 ran on modified OpenBSD, would it be possible to run physical disc games trough a disc drive on a Linux laptop by downloading the needed libraries? In what way would I need to modify the games/system?
Would the architecture play a big role? My thinkpad barely runs RPCS3 but can handle AAA steam titles.
The architecture is certainly a big issue.
Nothing else really maps 1:1 to the PS3 CPU. The main overhead is not from translating the libraries. It's emulating the CPU/recompiling the code.
There would likely be no efficiency gain from running the games on software that more closely matches the PS3 OS.
It'd be like the difference of using windows instead of proton to run games. Not always better. Sometimes worse.