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>-"..classitis": author criticizes the use of many small classes and functions/methods while I think form my experience SOLID principles are there for a reason- every method/class should have one purpose only.

I don't understand how you can be so confident that SOLID means you should have many small classes and functions/methods. The question of when we should carve off a piece of reality (natural or artificial) and call it one thing, or say that it does one thing, is an ancient philosophical question with no single right or easy answer.



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