"One of the real challenges for a composer today is finding a way to structure a piece so that it comes across with a compelling dramatic arc. Things were a little easier back in the days when sonata form, rondo and other such genres were common, though in reality those classical forms provided little more than general layouts."
Original Article: http://www.nytimes.com/2012/10/15/arts/music/mivos-quartet-performs-compositions-by-modernists.html?_r=0