Matt Berninger has said he and Carin Besser wrote much of Sleep Well Beast about the challenges of their own marriage. The album was also heavily influenced by the 2016 United States presidential election. The band scheduled a worldwide tour in support of the album, which began in September 2017. In August 2017, "The System Only Dreams in Total Darkness" became the band's first song to reach number one on a Billboard songs chart, reaching number one on the Adult Alternative Songs chart. On November 28, 2017, the album was nominated for two Grammy Awards: for Best Alternative Music Album and Best Recording Package, later winning the Grammy for Best Alternative Music Album. While on tour to support the album, The National performed new music during a performance in Zagreb, Croatia. The band wrote the music for the 2018 musical Cyrano by Erica Schmidt, an adaptation of the 1896 play Cyrano de Bergerac by Edmond Rostand, which starred Schmidt's husband Peter Dinklage in the lead role. Like most of The National's music, the songs for Cyrano all have lyrics by Besser and Berninger, and music by the Dessner brothers. On March 5, 2019, in an interview with Indie88 in Toronto, Aaron Dessner confirmed the band's new album would be called I Am Easy to Find, and was scheduled for release on May 17. He also debuted the album's first single "You Had Your Soul with You". The band also announced a Mike Mills-directed short film of the same name starring Alicia Vikander, which uses different arrangements of songs from the album as its soundtrack. On April 4, 2019, the band released their second single and closing song off I Am Easy to Find titled "Light Years", accompanied by a music video starring Alicia Vikander. On May 1, 2019, the band released their third single from I Am Easy to Find titled "Hairpin Turns", accompanied by a music video. The band released a cassette box set titled Juicy Sonic Magic for Record Store Day Black Friday on November 29, 2019, which featured their set at the Hearst Greek Theatre in Berkeley, California in September 2018. In 2020, the band contributed to Taylor Swift's ninth studio album, Evermore, appearing alongside Swift on the song "Coney Island". The album was co-produced by Aaron Dessner and Bryce Dessner (the former of whom also co-produced Swift's eighth studio album Folklore). In 2021, Cyrano was adapted