This is one of the differences between the bsnes/higan family of SNES emulators and the previous generation (ZSNES/snes9x/etc). bsnes/higan and emulators derive

This is one of the differences between the bsnes/higan family of SNES emulators and the previous generation (ZSNES/snes9x/etc). bsnes/higan and emulators derived from them managed to emulate the SNES more accurately (which required more processing power), and this allowed having fewer game-specific hacks. Emulation benefits hugely from increases to processing power over time.