I live in Minneapolis and there's often commercial property in residential areas that was built before modern zoning. I think this is fairly common. But these commercial properties seem poorly used. Maybe some turn into studios, some storage, some vacant. It's uncommon that they are retail, though maybe it's infeasible to get them permitted for many retail functions (partly due to regulation, partly due to zoning since renovations are limited). But really it just doesn't feel like the demand is there.