South Africa all-rounder Wiaan Mulder believes the future belongs to specialists, saying the physical and technical demands of modern cricket make it increasingly difficult to excel across all three formats. In an exclusive interaction with TimesofIndia. com, the South African all-rounder discusses the evolution of T20 cricket, his reservations about the Impact Player rule, cricket's growth in the USA, and why SA20 has played a key role in the Proteas' recent success.