I think I'm gravitating more and more toward emulation, as opposed to using actual older consoles. I was dicking around with my Gamecube Gameboy player. At first, I was experiencing horrible lag with the stock disc. So I purchased the Action Replay Disc, so I could load the Gamecube Gameboy Interface. Even that wasn't quite perfect; there was still a bit of lag.
I had to ask myself why I was going through all that trouble, when I can just hook up my Nvidia Shield Portable to HDMI, connect my wireless controller, and run MyBoy. The picture is clearer, and there is no lag. Because it runs Android, I have access to all kinds of emulators, all of which have less lag over HDMI than the actual consoles over composite. Anything I run via emulation has much better quality than RF, too.
I already know how Keetah is going to respond, if he sees this thread. I think I might be firmly in his corner on this one. It doesn't seem worth the trouble to mess with orignal hardware anymore. Never mind the problems associated with keeping some of this old stuff running. With video lag, emulation is in some ways actually superior.