Other systems don't have nearly as bad Composite Video output as the Genesis seems to have.
it makes me laugh because people are like I REMEMBER PLAYIN THAT BACK IN THE DAY, MAN THAT WAS FUN.and then I go "yeah I remember playing that 2 days ago because I still have my SNES, retard"
I S-Video modded my Genesis and the difference was huge. RGB doesn't seem to be all that neccisary now, but then I'm not a huge Genesis can anyway. PVMs take every SD signal known to man, usually, you don't need RGB to enjoy a PVM, but it helps.