Object-Oriented Programming is The Biggest Mistake of Computer Science. Its popularity is very unfortunate, it has caused tremendous damage to the modern economy, causing indirect losses of trillions upon trillions of dollars. Thousands of human lives have been lost as a result of OOP.

Why is OOP a mistake?

Nondeterminism inherent in OOP programs makes the code unreliable.” As the program executes, its flow can take many, many different paths — thanks to all of those different objects, with new objects sometimes even created on-the-fly.

Is OOP actually good?

OOP encapsulates data by default; objects contain both the data and the methods that affect that data, and good OOP practice means you provide getter and setter methods to control access to that data. This protects mutable data from being changed willy nilly, and makes application data safer.