Live/work as it is known today was pioneered by artists colonizing underutilized industrial and commercial buildings and districts enabling state legilation sponsored by Senator Petris. It has been theorized that the containerization of world freight shipping often is the root cause of said underutilization because it rendered a class of buildings -- the downtown loft warehouse -- redundant. In what is now a familiar sequence of events, developers soon followed the artists, to be followed not long after by galleries, yuppies and Starbucks. Lofts are popular, and are now sometimes being built from the ground up. In areas where this new use -- usually a primarily residential product -- is being well-considered and planned for as an orderly transformation of a neighborhood, this can be urban revitalization at its best. When cities permit ill-advised relaxations of planning and building codes that result in residential lofts being built in existing, viable commercial and industrial zones, the problems noted elsewhere under Residential Reversion can and will occur.