I believe OOP gained such a foothold in programming world because it was (and still is) very useful for building GUIs on the PC. Since PCs have taken over the w

I believe OOP gained such a foothold in programming world because it was (and still is) very useful for building GUIs on the PC. Since PCs have taken over the world, so had the OOP. But in other areas the OOP model is questionable. For example, you have transaction processing applications that have been built for years on mainframes with different models.