Classical music in the 21st century has seemed in a precarious state. Some regional orchestras have teetered on the brink of extinction. Arts education is fighting for survival. Critics warn about the "graying" of audiences. Nevertheless, recent news items also hint at a possible countertrend.

Consider: Pianist Jonathan Biss announced the creation of a free five-week home-study course on the Beethoven Piano Sonatas beginning Sept. 3, offered through the Curtis Institute and online content provider Coursera. At last...