wever, in practice this approach also leads to the reproduction and reification of existing social categories through algorithmic surveillance, tracking users across sites, gathering and selling their data, and the development of filter bubbles (only showing users content that we believe they are comfortable with).

PREGUNTA ¿Que es la reificación?

The difference is that with the Smalltalk code I can let the message do the talking. The message initiates the action. With C# I have to call a method in order to "send a message." This is what OO is supposed to avoid, because we're exposing implementation, here. It reifies the abstraction.