Gould had a pronounced aversion to what he termed “hedonistic” approaches to piano repertoire, performance, and music generally. For him, “hedonism” in this sense denoted a superficial theatricality, something to which he felt Mozart, for example, became increasingly susceptible later in his career. He associated this drift toward hedonism with the emergence of a cult of showmanship and gratuitous virtuosity on the concert platform in the 19th century and later. The institution of the public concert, he felt, degenerated into the “blood sport” with which he struggled, and which he ultimately rejected.

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Gould believed that the institution of the public concert was an anachronism and a “force of evil”, leading to his early retirement from concert performance. He argued that public performance devolved into a sort of competition, with a non-empathetic audience mostly attendant to the possibility of the performer erring or failing critical expectation; and that such performances produced unexceptional interpretations because of the limitations of live music. He set forth this doctrine, half in jest, in “GPAADAK”, the Gould Plan for the Abolition of Applause and Demonstrations of All Kinds.

From the Wikipedia article on Glenn Gould.