He could use both (component, composite or even scart if he's in Europe..), depending on the tv, it might have just composite, composite + component, or composite + scart (EU).
I was hoping mega man anniversary collection and eternal sonata worked for the series x, but neither does. there's not a whole lot of xbox original games I care about, but mmac is good with its remixed music. I have a ps2 for most everything else aside from some of the exclusives. I know the halo games are on the series x, like the master chief collection. I think all of the games work, though I'm sure that was like the first game they made bc. lol
It's like calling PlayStation as PS1. Nothing wrong with either of those two terms (although I prefer just to call it Xbox since it's the name originally given).