[Zope] zclasses vs objects

hello, (again) i'd like to know where the real difference between zclasses and just a bunch of objects and propertys. zclasses do have data types, objects don't zclasses have special constructors, objects don't but (for small collections) isn't it possible to use folder + properties + objects instead of classes ? what are the real problems i'm likely to encounter doing so ? scalability ? speed ? maintenance ? thx,

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