What percentage of successful entrepreneurs work their asses off?

Hello successful entrepreneurs,

What is the price of "success" in terms of work life balance?

Obviously to succeed at a tech startup you have to work 70-80 hours a week, possibly more.

Is this true in all fields of entrepreneurship?

Is there a point where it "gets easier"?

I'm curious to hear real world anecdotes about successful entrepreneurs and their work life balances. (I.e. if you are a successful entrepreneur, tell me your life story through a work-life balance lens.)

Did you work super hard in the beginning, then take it easy once business started booming?

Have you always worked hard? For like 10+ years?

Have you had periods where you worked super hard and periods where you didn't work super hard?

Have you always had good work life balance? Did you manage to enjoy life while building the business?

Do you think that some long periods of relaxation/introspection/travel have helped you clarify what you wanted to do/learn? Or do you just view them as wasted time?

I don't mind working my butt off (forever if I have to)...

I just want to know what the standard is.

How much "life" do I have to sacrifice? What is the price of success?