Even at a meager 2% interest that’s $40k a year. That’s a comfortable wage in much of the USA, especially if you’ve been camping in an RV for a decade to retire.
I don't believe anything I read on HN about the lifestyles of the SV elite, but I think this scenario is comical if it were representative.
You get paid well into six figures but have "to camp in an RV for a decade", and then you retire with a $40K income. You could have just gotten a $40K job at some place* that didn't kill your soul! In ten years, you'd be making at least $60K. And if you burned out for whatever reason anyway, you could go on disability.