Well, comparing m43 cameras with full frame is like comparing Phase 645 sensor with FF cameras. M43 cameras are really nice and lightweight but have their own limitations.
All the Leica m43 glass are so called Pana-Leica glass: Panasonic designed and manufactured but Leica rubber stamped. They still are really nice glass, though :)
Disclaimer: used Olympus 4/3 and m43 for reaally long time but the mirrorless full frame gear feels so much better in the closely same sized package.
I agree but do not care nevertheless. Still using a small sensor Ricoh GR Digital III most of the time. If I ever want background separation I just pick up the m43. It's good enough. Most people are happy with a phone camera. All of them have really obvious distortion. It's great that there are so many choices to choose from.
All the Leica m43 glass are so called Pana-Leica glass: Panasonic designed and manufactured but Leica rubber stamped. They still are really nice glass, though :)
Disclaimer: used Olympus 4/3 and m43 for reaally long time but the mirrorless full frame gear feels so much better in the closely same sized package.