Working long hours isn't a guarantee of success. My father used to go to work at 5am every morning. He'd come home at around 5pm with a stack of work. After dinner, he'd log into his office and do more work until he went to bed. On the weekends, he brought home an even larger pile and worked on it on Saturday and Sunday.
He didn't get any extra money for all of this work. When I once asked him why he did it, he answered "My boss expects this level of work from me." (Well, of course he does. You are giving him that without insisting on overtime.)
So what did all of that work get my father? He was fired when he was in his 60s. Nobody would hire him in a managerial position because they feared he'd just retire soon. Better to hire someone younger who might be with the company longer. So he retired not because he wanted to stop working, but because he couldn't find work. He's now 70, suffering from health effects, in part, from sitting at a desk all day every day for years.
When I got my current job, I insisted that my work ends when I leave the office. If a system is down during an off-hour, I'm happy to help get it up and running again, but I'm not going to be bringing projects home to work on after hours. Could I work 10 hours a day and bust my rear to do more for the company I work for? Sure, but it wouldn't get me anything and would cost me my health and time that I could spend with my family or working on projects that I want to work on (versus my day job which pays the bills).