I don’t think Madoka Magica gets enough credit when it comes to the popularity of anime in America. It seems like when people trace back anime’s popularity exploding in The United States, they mention Attack on Titan. However, Madoka Magica really helped in way of the growth in popularity of anime.
Course, that’s not to say anime wasn’t already popular. Stuff like Dragon Ball, Sailor Moon, and Cowboy Bebop airing on Toonami and Adult Swim really aided the popularity of anime in America. But even with anime airing on Toonami and Adult Swim, it still felt relatively niche. It wasn’t until the airing of Madoka Magica did anime really felt like the genre was transitioning from niche to not so underground. And then once Attack on Titan happened, the whole roof was blown off.