I'm one of the lucky ones who got an MILC at the right time. The sony cams have almost all the traits sujoy mentioned, wifi, high res EVF, ir support, ability to connect and be controlled by a phone, apps etc. Used a friends oympus and that is even better (micro 4/3), it has inbuilt intervalometer, great focus peaking modes and can get all the adapters i use.
With the native lenses its very compact, it's only once you fit adapters and adapted lenses that the size gets crazy. Even then with my small bag i can easily keep 2 lenses, my gorillapod and my camera body.
I still want to get a full frame but mostly due to the low light performance and ability to take it to high ISO. but mostly I'm covered