It is still extremely common today, if you look at the demographics along the Atlantic Coast of the US. The richest zip codes always have poor ones nearby.
By the standards of underdeveloped countries today or historical poverty in general, these "poor" people are nonetheless living in outright opulence: their genuine plight is mostly one of social marginalization, that can't really be solved by purely economic means. That's partly the effect of new technology (developed by capitalism) but partly redistribution in action.
By the standards of underdeveloped countries today or historical poverty in general, these "poor" people are nonetheless living in outright opulence: their genuine plight is mostly one of social marginalization, that can't really be solved by purely economic means. That's partly the effect of new technology (developed by capitalism) but partly redistribution in action.