I'm in my 50s. I've been through the death marches, the unrealistic goals, the 60-hour weeks, the last minute emergencies, the all-nighters trying to get a release out or trying to recover from the fallout of a poorly tested release.
I won't do it anymore. Nobody I know who is my age will do that anymore. There's almost nothing that will keep me at work past 5:00. The sun will come up tomorrow and nobody will die.
So if you're looking to hire someone who will ask "how high" when you say "jump" then you probably don't want to hire an older person.