7th gen or 8th gen

[BraLoD]

8th without a single doubt.
PS4 had some of the best games ever, and a lot more great games than PS3.
Wii U also had great games, some of Switch best games are games born on Wii U or straight up Wii U games (BotW, 3D World, Tropical Freeze, Mario Kart 8, Splatoon, Mario Maker).