"First there was HipHop, the PHP interpreter which improved performance, now usually referred to by the less embarrassing name HHVM. Building on HHVM, they've just introduced Hack, which 'reconciles the fast development cycle of PHP with the discipline provided by static typing, while adding many features commonly found in other modern programming languages.'
Over the past year, Facebook has converted nearly all of its PHP code base to Hack, which makes up the core of its website."
How does playing 8 bars from Bernstein "prove" that a band has sold out? Had The Nice sold out when they played the whole piece? Why should hints of socio-political commentary be considered selling out? If that's the case, then most punk bands sold out before they sold anything.