I don't really understand arguments for or against OOP. OOP, to me, has always been about blackboxing some data entity and interacting with it through an API. W

I don't really understand arguments for or against OOP. OOP, to me, has always been about blackboxing some data entity and interacting with it through an API. Where it got wild and wacky was inheritance, but there's nothing fundamentally bad with having a process or object with an internal state you interact with via an API, e.g. a microservice. Most computer programs have an internal state that you interact with through some API. And sometimes you need to compartmentalize a process and have it work independent of another process. There's literally no way to get away from programs with an internal state and API access since that's how computers, and electronics in general, work.