This week (Oct 16-23) in emulation: RetroArch fixes input issues on PSVita/PSTV, PS2 port of RetroArch is in development, Switch Overclocking for better emulator performance, PS4 FW 5.05 gets a NES emulator,
PS2 How To Install RetroArch! New NES & Mega Drive Core! - YouTube
Install & Setup RetroArch On PlayStation 2! - YouTube
Play! Libretro core (PlayStation2 emulator) ready for download on the Libretro/RetroArch buildbot! – Libretro
PS4 - RetroArch (PS2) for PS4 - Play QuickNES & 2048 on your hacked PS4 | PSX-Place
RetroArch mGBA Gameboy / Gameboy Color PS2 on PS4 Emulator Port | PSXHAX - PSXHACKS
No PS2 core to download Ubuntu 19.04 : r/RetroArch
RetroArch 1.7.6 released: PlayStation 2 port released with 4 cores, significant progress made on PlayStation 4/Xbox One ports, Ozone menu driver (Switch-esque) added and more! - Wololo.net
PS2 - (Progress Update) RetroArch PS2 - New port now In development for PlayStation 2 | PSX-Place