I think also depends where in the US. In Seattle, a lot of tech workers are with Amazon. When I worked with Amazon, over two years, there were perhaps two weeks total where I worked less than 50 hours. In that job, and in several that followed, the office was for collaboration, meetings, maybe an hour of actual work, and then at home was where the second workday began in a quiet setting & you put in 3-5 hours additional coding (plus whatever on-call threw at you).