Frankly, that’s it. I had lots of in-person gaming-related interactions with younger folks and they almost always have an initial shock with retrogaming, even if they’re genuinely interested. The general style, looks, progression, mechanics, difficulty and feeling of those games are already different enough for youngsters, and if you also throw in a vastly unique display simulation to them it will certainly be a “double shock”.
With that in mind, I can’t really blame emudevs for trying to “smooth out” first impressions, at the expense of the (fewer) old-enough players. Personally, as long as both options are readily available, I don’t mind. Still, it would be nice to have some kind of encouragement for the new players to try out a more classic look, even if just as a curiosity.