Comment by kgwgk

From the link in geofft's comment (https://news.ycombinator.com/item?id=18538873):

"At first, each community is defined by its potential. But as that potential is realized, the community begins to be defined by its compromises. That change is felt most keenly by the people who were there first, who remember what it was like when anything seemed possible. They feel fenced in and so they move on, in search of their golden city."