When I was younger I routinely worked late nights (I’d work normal business hours, then go grab a subway and come back to the office and work until 10-12. I enjoy working alone at night, and I wasn’t using that free time productively, so I figured why not. It did help my career trajectory significantly.

As I’ve gotten older and have better uses for my time I find myself working a ~40hr week and checking out. Occasionally if I have a challenging problem that requires deep focus I’ll log on at night, but only because I like the satisfaction of “the grind” every now and then.