FDSOI is a really interesting technology for low power but doesn't have enough support amoung device manufacturers to be anything more than a niche. I ran through the math in an article posted here: https://www.semiwiki.com/forum/content/3128-soi-future-flop.html I don't see it representing more than 5% of leading edge logic.
450mm is likely pushed out until after 2020 to around 2023.
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