Being in my 40s and having been there (in my 20s) I can tell you they will grow to regret it. That said, its up to people like me running teams and businesses

Being in my 40s and having been there (in my 20s) I can tell you they will grow to regret it. That said, its up to people like me running teams and businesses to set the tone - encourage balance while not squandering inspired work. Re inspired work: I once made the mistake of telling one of my employees "slow down a little, i don't want you to burn out and hate working here". He had an astute response: "Andy, I'm inspired I have to keep working on this until its done!" He worked weird hours - night and day for 2 or 3 days ..and when it was done I remember him needing some well deserved R&R. The message from there on out to my teams is - if you're inspired, work. When you're done, rest. I'm not watching when you roll in in the morning, I'm watching the team's accomplishment and morale.