Sexual Weirdtopia could just be “the internet comes to life”… e.g. everyone gets freaky without shame, but it turns out almost everyone is into something that’s of absolutely no interest to you personally.
Or, to follow the public science example, the taboo is revealed to be as fundamental aspect of sexual arousal as the unknown is to the intellectual. The people demand a strict morality police after an era of total acceptance drains all the fun out of it. Everyone is fully expected to both seek out sexual thrills and aid in the swift punishment of anyone who seeks out sexual thrills: If you ask for a spanking you may be asking for a spanking.
TGGP: with respect to migration, I always thought the idea was to immigrate to a land of “opportunity”—that is, the attraction is that if you move to America (or wherever) you’ll have more social AND economic mobility. I know immigrants (to my own country, Canada) who actually were quite despondent for a while after arriving here because, while their nominal income increased their relative social position took a serious dive (to stereotype, think of an Indian doctor working here as a code monkey).
It seems to me the phenomena Eliezer is describing are well illustrated by (my own experience in) academia. On the one hand people overspecialize to find a sufficiently small pond that they can be the big fish. On the other, the superstars I know best are extraordinarily competitive/driven and tend to think of the whole world as consisting of other high-achieving academics and assorted debris, thus reducing the “world” literally to a few hundred monkeyspheres in size.