You work a *lot* more hours. And you do work. Back in the day you'd have time to do research projects to keep my skills up no problem, it was encouraged. These days you're on 24/7 and doing one very tightly defined task because your CEO doesn't want you to be too critical to the company, they want a cog in the machine they can replace as needed, even if that means paying a little more. The predictability is worth it.
I mean, I guess if you're one of those freaks that doesn't need sleep. I've known a few. Get by on 4 hours a night and they're fine. It's like having an extra 28 hours a week in your life. But for us mere mortals we're kinda stuck. We make due with what we've got.