I'm not expert and struggled to read Bostrom's Super Intelligence, but my interpretation was it started with a lot of broad, hand-wavy factors & historical interpetations, layered on some pretty tenious projections as inevitable and wanked off with deep thought experiments. I get this sort of open-ended exploration has value, but I'm not sold on it's "prioritized value" when compared with other areas and directions.
It's extremely repetitive; he could have written a book one-third of its length without leaving anything out. There's some good stuff in there, but I was sort of annoyed that the author forces you to read everything three times. Kinda disrespectful to his readers' available free time.