The pandemic may be winding down, but the work-from-home revolution marches on. Nearly 30 percent of all work happened at home in January, six times the rate in 2019, according to WFH Research, a data-collection project. In Washington and other large urban centers, the share of remote work is closer to half. In the nation’s biggest cities, entire office buildings sit empty. The COVID-19 pandemic transformed the American workplace. The share of all work performed at home rose from 4.7 percent in January 2019 to 61 percent in May 2020. Some economists consider the remote-work boom the greatest change to...