I'm in my mid-late twenties however, where the time is certainly much more valuable to me. A lot of the things I find most fun are rather physically demanding, you can go much harder for much longer on a mountain bike or on skis the younger you are.
I guess there's an argument that you can retire earlier if you work more right, but I think I'd get less out of that than having more time now. Maybe that'll prove to be a mistake in the long run, who knows.
Honestly there wasn't much to it I just asked, but also made it clear I'd be leaving if the answer was no. Company already had some part-timers (though they are mostly new parents, so our motivations differ.)
Even if they're strict about 4x10 or 5x8 as a software dev I find it winds up being more like 50+ hour week anyway because of the need to invest in continuing education (which is 99% reinventing the wheel in Today's Favorite Framework/Language, but that's how it goes)