We are separated from the 1930s by decades of profound economic, technological, and political change, and a modern landscape of scarcity would reflect that.
What, then, would we see instead? And how would we even know a depression had started? It's not a topic that professional observers of the economy study much. And there's no single answer, because there's no one way a depression might unfold. But it's nonetheless an important question to consider - there's no way to make informed decisions about the present without understanding, in some detail, the worst-case scenario about the future.
By looking at what we know about how society and commerce would slow down, and how people respond, it's possible to envision what we might face. Unlike the 1930s, when food and clothing were far more expensive, today we spend much of our money on healthcare, child care, and education, and we'd see uncomfortable changes in those parts of our lives. The lines wouldn't be outside soup kitchens but at emergency rooms, and rather than itinerant farmers we could see waves of laid-off office workers leaving homes to foreclosure and heading for areas of the country where there's more work - or just a relative with a free room over the garage. Already hollowed-out manufacturing cities could be all but deserted, and suburban neighborhoods left checkerboarded, with abandoned houses next to overcrowded ones.