Thanks for sharing your images Pyrofer!
Motrucker, I don't know where you are located... in Europe (PAL countires) then S-Video may be rare... But at least in USA, S-Video was very common (about 5 or 10 years ago).
S-Video simply puts both Luma and Chroma signals into a single cable... our Vintage montitors (1084, 1702, 1904) use two seperate cables.
An alternative, Composite, mixes both Luma and Chroma into a single wire ... sadly, most modern (c.2015) TVs allow Composite but not S-Video.
(The bad think, IMHO, with Composite is low quality: the TV/monitor must unscramble the single wire into 2 seperate signals... and the process is not perfect [thus, lower quality].)
So I can understand why you might no like S-Video (not popular with modern US/NTSC hardware, and never popular with PAL), but it gives the best video quality, in my opinion, aside from pure R,G,B.
Pure R,G,B is not possible with modern TVs (my USA experience)... closest would be VGA-compatible TVs. You can simply convert 80-column (VDC) video into VGA-type signals, but it is very complex to convert VIC-II into VGA-type signals.
Because both VDC and VIC-II signals can easily be transformed into S-Video, I think S-Video is a good standard... in the USA... in Europe, I think SCART would be better... but I don't actually live in Europe, so I could be wrong.
I am in the US, in Maryland, close to Washington D.C., so my retro computers are all NTSC. I have tried S video, and never could seem to get it right, so I am using a CRT on my C-128 right now - an Amiga 1080 monitor - untill I get a new RGB interface for it. I have several monitors I hope to use, one that is an AOC LED monitor that should work fine.