It's a challenging habit to start but not as difficult as you'd imagine to maintain. That said, I've met a number of other professionals that sustain similar schedules. I have an array of hobbies including flying, rock climbing, tennis, and traveling. I've never been diagnosed with any behavior or personality disorder and organize social time primarily around the weekends. I also hit the gym every day which helps a lot. I completely credit any success I've had to working out frequently.

I don't cast any judgement over developers not choosing to reinvest. I also think it's critical to know your limits and stay within them. I've been burned out several times throughout my career and know where my limits are.

I am however very certain that this industry rewards continued learning and with the right mindset it's very rewarding both in the short and long term.