I see it a lot in HuggingFace, and use it myself for classes that are used like a function, especially when the obvious method name is the verb form of the class name

    processor = SomeProcessor.load("path/to/config")

    # with __call__
    processed_inputs = processor(inputs)

    # less awkward than
    processes_inputs = processor.process(inputs)

The only benefit is to the human, same as @property or even @dataclass.