It's still like this in some limited cases. My brother-in-law is a glazier. He clearly needs to be on-site to do this. Work can't follow him home. My wife works in software just like I do, but she's worked exclusively on classified projects for 20 years, so work can't follow her home because she can't legally receive any of the relevant data at home. Work phone and work e-mail are on airgapped networks not accessible from home.