When did games stop requiring manuals?

I'm trying to get into some retro games, like Chrono Trigger for SNES. To my shock, there's a good amount of required reading before you can even dive into the game. The combat seems pretty deep - not a bad thing! Thing is, generally, I have about 2 hours of free time that I can devote to gaming and I don't want to spend that reading a manual. When I was a kid it was fine. Buying a brand new game with my parents, on the ride home, the manual was like a really good soup before the prime rib. Now as an adult, reading manuals just feels like work.

Modern day, manuals have been replaced by in-game tutorials. So, when did manuals die? Which console generation, PS2/XBOX, PS3/360, or even later?