well, i was far from here in the last months, so it's time to put my word here.
Corn is the only emulator that most users can run, but because it emulates everyrhing. 1964 and PJ64 does not, they only emulates the core. It's like a made-in-china N64 versus a board without the video and audio hardware. Why not the plugins authors made a plugin for low end users? Because they have hi-end hardware, and the people that they know uses also good hardware.
Look at me, stuck with a Celeron 700 (not even a PIII), with a crappy integrated SiS 630, NOT SUITABLE FOR 3D GAMING OF ANY TYPE, and running Mario very welll (and with 90 stars and no cheats), and cannot play another game! Why???? because "you can buy a new PC" with "virtual ca$h".
I REALLY want a new PC, but i can't afford it. So for all my gaming issues, i must depends on the good will of the programmers.
I send this call to plugin coders, rather than emulator coders: PLEASE remember that not everyone on this earth comes to this world with a GeForce/Radeon under the arm!