Obviously not everyone. But many people review their priorities at this age. At the same time, you body and your mind start suffering from such dedicated lifestyle: back pain, depression.

You also most likely reach your salary cap in 30s as a coder, so you'll get no ROI on coding more.

Suddenly, physical activities, rest, communications, hobbies make more impact on your work performance.

In the end, it's a matter of personal choice, and the choice is not black and white between work as a meaning of life and leisure skiing till lunch.