Bad practice to return unique_ptr for raw pointer like ownership semantics?

Returning a std::unique_ptr from a factory method is just fine and should be a recommended practice. The message it conveys is (IMO): You are now the sole owner of this object. Furthermore for your convenience the object knows how to destroy itself.

A std::unique_ptr uniquely owns the object to which it points. It says "I own this object, and no one else does.

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