Back to my original post, why talk about Volkswagon sales on a forum about top-end sports cars. The markets are completely different, with different consumers using different buying criteria to fulfill different objectives.
Your conclusion that doubling sales has little meaning in the aggregate market is true, but your conclusion has even less meaning. Who cares about an aggregated market view incorporating the large segments that focus on attributes irrelevant to the people on this forum.
Within the subset of the market focussed on SQ, growth and market share gains in vinyl have been significant and to those interested in this market segment (i.e., Ferraris) it matters. To me you come off as using an irrelevant statistic to somehow indicate a deficiency in vinyl. To me thats just silly. But I admit, maybe its all on me and I am completely missing a relevant point about vinyl you are making to this particular audience.