I grew up while android/ipads were starting to take off and spent a lot of my childhood playing fruit ninja and minecraft pocket edition. Now I'm >20 and I don't have a single game on my phone. I'm not sure what changed but I just don't have any desire to play light/casual games anymore. On the bus I am happy to just sit there with noise canceling headphones and think. Then when I get home I'll spend an hour on a VR game.

Hey! My gameboy was a screen with 2 bits of color depth! What's not serious about that? :D

Good point actually, but that almost (?) two decades wide gap between mainstream gameboy mobile playing and the iPhone was quite an opportunity to drop the habit. Well, there was Nokia snake.

I was in Singapore recently and regularly saw adults smashing away at games while on the train.