I would love to see an S-Video input for this device. I have to say that is one of the only things keeping me from purchasing this product. It would be much easier for people who don’t want to mod their N64s and GCs to accept RGB or YPbPr.
It’s easy to find cheap passive adapters to convert S-Video to SCART, but the OSSC would need to support it. Button 8 on the remote’s numeric keypad is unused, so that button could be used to select S-Video over SCART, if the hardware and firmware can support that mode.