DL is not the Hermes of US aviation. At best it’s trying to be something like Coach, in practice it’s probably more equivalent to Target. Contrary to how it may attempt to market itself, it’s ultimately a mass market product.
My comment is not inconsistent with yours. No commercial airline is the Hermes of aviation.
Delta is segmenting its customers, trying to attract, at the upper end of its offering, the most high value customers — those who are willing to pay for, at best, mass luxury.
It’s all product marketing. No one equates Delta One with the experience of flying in a G650.