That is a software emulation of the RDP from the n64 that runs in a shader on your GPU. No more visual bugs, no more artifacts, no more perfect dark missing a visual effect that kills an entire mission, and accurate upscaling, and it actually runs very well even on cheap GPUs.
Your assertion of a social requirement for an "agreed upon" project is false: every emulator is valid, though some have their pros and cons. If it plays the game you want to play just fine, what makes it "difficult"?
Your GPU won't matter too much, so long as you have a decently powerful CPU you should be fine.
