At least where I used to live around the Amish long ago they would put those big orange reflective triangles on each end. The rest was plain as can be as usual. It sounds like it depends on the group but many are fine using something not-entirely-plain if it has a safety benefit. I’ve seen the Amish using safety gasses etc.
The difference is how low spec the series S is.
Something like Baldurs Gate 3 on existing PS5 was able to handle everything they needed including the split screen co-op. However, they couldn’t release on Xbox at all because they couldn’t make a version that worked on both S and X but also they weren’t allowed by MS rules to pull features from the S.
A PS5/PS5-Pro pair would be easier since the bottom spec is still about comparable to the Series X and the new tier is just a bit extra for some nice-to-haves and less having to handicap a game to get it to run on the low spec machine. It’s still extra work but shouldn’t mean having to rework an entire game to get it to work at all.