[2020] Old weapon skins and new weapons?

When discussing weapon skins, are you specifically talking about the Seasonal Weapon Skins? They are intended as a limited-time option that are available on weapons that are released during that season and prior, which is why some of the older skins are not an option for newer operators/weapons. I don't know if the team has the bandwidth to retroactively make those older skins apply to newer weapons. Personally I don't think it would make sense since you can't purchase those skins anymore.