A sad day for aviation in the southwest. I completed my PPL at PLY, must have flown C152'2, PA-28's, Arrows and Duchesses in and out hundreds of times. ATC weren't always the friendliest, but you had the impression the airport was a tightly-run operation with high standards.
In many ways we live in aviation unfriendly times, with a distinctly aviation-unfriendly government. Airports with largely domestic-oriented traffic are having a hard time in particular. Maybe we will look back at the 1990's and early 2000's as a golden age in commercial and private aviation, before ever-increasing APD and "climate-change" issues began to bite.