[mumblemumble]

That seems like an unnecessarily confrontational way to put it.

What I would say is that, from a 10km perspective, functional interfaces are just where the Interface Segregation Principle takes you when you really lean into it, and that dependency injection can be thought of as just a convenient way to do partial application in bulk, and that CQRS encourages you to create an ever-wider separation between your commands and your queries, and that, in general, once you get far along where clean object-oriented design wants to lead you, the whole functional vs OO debate often starts to feel like it's quibbling about syntax as much as anything else.