From the article:
"with one exception. That exception was Vermont, which ranked second on the list of states with the highest proportion -- 67 percent -- of inbound moves."
As leftward-leaning as it is, Vermont will probably remain one of the last "most-livable" states in the country (providing one doesn't mind the concept of "winter").
The reason:
Diversity.
Or, more correctly, the -lack- of it "up there"...