Bsnes emulator has a branch original development which called Higan focuses on features, performance and ease of use. Developers make the decision to return to the Qt GUI which has a much faster PPU renderer, giving better performance of the old bsnes core.
Bsnes is available on many platforms like macOS, Linux, Windows, OpenBSD, FreeBSD and libretro core, which can help for RetroArch as it requires libreto core.
Bsnes was started as an emulator which should provide a more faithful emulation of the SNES hardware than other snes emulators.