Almost immediately after the Netflix horror series “Stranger Things” premiered in 2016, it exploded in popularity, becoming streaming TV’s first true megahit. For the youthful cast, sudden fame was its own kind of Upside Down, a place that resembled the real world but was disorienting and undeniably different. The young stars — all adults now — looked back on the show and how it shaped them. https://nyti.ms/49K2Vra | The New York Times