Recursive attr.evolve

In the same manner as attr.asdict(..., recursive=True) exists, I have a use case for a similar option to attr.evolve(). I want all attr instances evolved, but with no need to deepcopy any non-attr attributes. I ended up implementing the code below. Could this be a consideration for addition into python-attrs?

def evolve_recursive(inst, **changes):
    """ Recursive attr.evolve() method, where any attr-based attributes
        will be evolved too.
    """
    cls = inst.__class__
    attrs = attr.fields(cls)
    for a in attrs:
        if not a.init:
            continue
        attr_name = a.name  # To deal with private attributes.
        init_name = attr_name if attr_name[0] != "_" else attr_name[1:]
        if init_name not in changes:
            value = getattr(inst, attr_name)

            # New code
            if attr.has(value.__class__):
                value = evolve_recursive(value)

            changes[init_name] = value
    return cls(**changes)