1. no, you don't. as i mentioned earlier, ones, who was in mood and financial condition to purchase SACD player in the past,Unfortunately you lose the Stereo SACD & Stereo CD fans with BD-A. So it's a non starter for many companies.
In fact, a writer over on the Computer Audiophile forum mentioned having lunch with Universal Music Europe - who asked him at lunch why is there a lack of interest among consumers in BD Audio? Hmm....
most likely already does have BD player or easily can afford to buy one (which will cost to them equal of purchase of 2 SACD disc).
2. a) the answer to this question would be a question - how ones can avoid lack of interest to their product, if from their side was
done NOTHING, to promote it and educate potential consumers.
b) variety+quality+price=success. so far i see they going the way, SACD, DVDA, DualDisc already tried before and failed miserably.
poor selection, average, for most part, quality, high price it's recipe for failure.