The Chinese academia's old friend, the world's leading scholar of avant-garde poetry, Marjorie Perloff died on March 24. Perloff was celebrated for her ability to explain difficult experimental poetry. This ability is seen in her early work on Yeats, middle works on 20th-century modernist movements as well as in her last books, 21st-Century Modernism: (2002), Unoriginal Genius (2010) and Infrathin (2021), comparing the new century's experimental poetry with early modernism. This paper, focused on the books of her later years, demonstrates her responses to the 21st-Century modernism and foregrounding the ideas and legacy in poetics of her later years, and reveals one of her major ideas that modernism is back in the forms of Eliot's verbivocalvisual complex and Duchamp's ready-mades, delays in glass, and the infrathin.