Does anyone know why Delta hasn't expanded the A320 overhead control panels (picture included in the spoiler below) to cover more of the fleet? I think they look incredibly sleek and modern, and while I wouldn't expect them to retrofit it to the entire fleet, I would at least expect them to include them for new planes. However, Delta did not include them on the A220 or even the A321neo, which is incredibly disappointing to me as it seems to point to Delta not intending to expand it further in the fleet at all.