OOP was never "centered around deep class inheritance hierarchies". It was centred around message passing and dynamic method dispatch. The only significance of inheritance is to resolve the receiver of a message.

I feel strongly that most of the people who think OOP was bad are people who have only ever experienced C++/C#/Java or some even weaker instantiation of OOP.

What do you suppose you're writing when you implement a (micro)service? It's nothing different than an object -- some implementation whose details you don't need to care about when you use it, which details can be changed at any time without disturbing clients (modulo idiocy), and an interface that you use to communicate with it via messages.

And don't even get me started on the OO vs. Functional nonsense...