I am skeptical about Mikoyan’s MiG-41 6th generation plane. Mikoyan’s has been absent from the development of jet fighters in the last 25 years or so. Many leading designers died or left Mikoyan. Knowing how difficult it has been developing 5th generation planes in USA and Russia , Mikoyan claimed to develop 6th generation plane by 2020? They may develop a plane whether it will be the 6th generation plane is another question.