12 questions on the Olympus OM-D/ Lumix GH3 - before I take the 4/3 plunge

Why does everyone always assume that it is "either/or"?

Just keep two (or three or four!) systems and choose the appropriate one for the job at hand.

There are times when I need my full frame, 2 body, full set of f2.8 glass Nikon D3s kit. And times when the GH3 is just fine. There would also be times when a Leica M would be good and times when a Medium Format would be good. Just not enough times for me to buy the last two (and I can't see well enough to focus the M lenses any more).

The two systems offer different strengths and weaknesses with some overlap. The obvious thing to do is maintain both systems.