Truthstation on 31 July 2020
8th generation
Wii U: 2012
PS4: 2013
Xbox One: 2013
Mid-gen upgrades of 8th generation:
Switch: 2017
PS4 Slim / PS4 Pro: 2016
Xbox One S / Xbox One X: 2016/2017
Btw Wikipedia lists Switch as 8th generation too.
https://en.m.wikipedia.org/wiki/Eighth_generation_of_video_game_consoles