I don't know how common it actually is. You hear about the startups that overwork employees far more than you hear about startups where people have a good work

I don't know how common it actually is. You hear about the startups that overwork employees far more than you hear about startups where people have a good work life balance, but there could be many reasons including the big one being that happy people who live well balanced lives don't tend to talk about it.