There’s also a commuter airline called Southern Airways Express that uses them to some regional airports (BFD, DUJ, LNS, IPT) from IAD based on FlightRadar.
Besides the Cessna Caravan being one of the most capable and downright awesome airframes ever designed, it is going to be a real treat whenever we get this guy in game.
To add to this list of current operators:
Southern Airways Express has a base at IAD, flying to a handful of small airports in Pennsylvania operating EAS flights. Attached are a couple photos of their Caravans at IAD.
I do love the caravan. Kenmore Air in particular, I flew one of their caravans up to the san jauns from Seattle a few years ago, and it was an amazing flight.