Not true about resale value in leather. Go to fashionphile and look up “Coussin”. Most pre-owned pieces are at or well above retail.
It is true historically about LV leather in the secondary market. The example you mention is for a current bag, an exception owing to limited stock in stores. But vast depreciation is the story for other LV leathers that start out with stiff retail prices, whether Suhali, Empreinte, Epi, Taiga, or the luxe smooth calfskin bags. This doesn't mean "nobody wants their leather," because many do, but canvas traditionally has held its value at much higher percentage relative to original retail price.
To topic, the disappearance of canvas is old rumor despite bubbling up periodically. A foolish thing to expect.