As I said, there are other choices for RW. But I don't base my media recommendations on PIE/PIF plots only! First I don't think they're always relevant in the overall picture (as long as they're rather good), and also I take the amount of user feedback/satisfaction into account, as well as my own experience with media. - I almost never recommend a media that I haven't personally used successfully in several different burners.
Not sure about that. I've been following this advice and since then I don't have anymore failed RW burns. I'll let members with more technical knowledge about phase-change materials give the relevant explanations.