With the news this week that Shonda Rhimes is leaving ABC for Netflix, the streaming giant added yet another big name to its increasingly deep bench. “Grey’s Anatomy,” “How to Get Away With Murder” and the final season of “Scandal” will still air on ABC, but much of Rhimes’s work going forward will be dropped in bulk, in perfectly bingeable doses. Since it began investing eye-popping amounts of cash in original programming, Netflix has quickly won over showrunners and filmmakers interested in getting financed with few strings attached.