Yunchan Lim’s electrifying interpretation of Rachmaninoff’s Piano Concerto No. 3 at the 2022 Van Cliburn International Piano Competition at the age of 18 is one of the most talked-about performances in recent classical music history. Lim, now 21, first gained international recognition with this very performance, which conductor Marin Alsop described as showing “an old soul, rather than a young …