They leave WV because of fewer jobs than almost anywhere. Illinois is vacating because Democrats control the state’s economy with all the feather-nesting of by and for the machine political hacks.
Vermont was once the most reliably Republican state in the union, but no more. Urbanites and suburbanites from megalopolis (mostly the dreaded New Yorkers) have turned it into a deep blue bastion. Why do you think Bernie Sanders gets so much support?
But Vermont will elect a RINO governor every so often because even liberals get tired of a certain zealous kind of liberal (like former governor Peter Shumlin) who wants Vermont to “lead the nation” in every kind of liberal boondoggle and free money giveaway, such as Single Payer socialized health care.