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The answer is a whimper and muffled sound vaguely reminiscent of a “yes.”
I can only speak for myself, but no. An appropriate amount was asked of me, and I probably ask for less from my students. I worked ~40 hours a week, plus maybe a couple crunches a year.
I think it depends heavily not just on the PI and student, but the field of study and department as well.
And the country!