I think the prior gloss charges proved insufficiently profitable to be sustainable for Zu, because meeting their standards skyrocketed the labor input to production. People are more demanding about finish quality of flat surfaces in their homes, under interior lighting than they are with automotive finishes on outdoor-lit compound surfaces objects like cars. The pair of Soul Superfly I heard were painted in a custom gloss color and it's an aesthetically transformative upgrade. They're above Wilson finish quality and look sensational. Whether it's worth $2K to you, only you can say but the gloss charge reflects the labor, materials and capital investment reality once the company truly examined the economics of custom gloss.
Phil