A microphone port allows connecting external high-end or specialized microphones.
4.Lots wider aperture at minimum focal length
vs 3.0 (the average)
vs 1 (best: Leica Q (Typ 116))
With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.