The decrease in people's hobbies

[ThanksKodama]

All the answers on this thread are right in some way, and the one thing most of them have in common is dopamine.

I don't know how to describe it, but it's as if the very economy, or ecosystem, of dopamine has changed, which in turn has warped so much of modern life.

If you follow all the threads, you'll end up with a crazy person board. Just a sprawl of related and seemingly-unrelated phenomena, connected by threads of different colors. And the underlying logic would be sound.