9 months ago, as a tired 50d owner, i would disagree. But now, as a frustrated NEX owner (with no good native lenses) and with 5d2 at so low prices...
I like BOKEH, i shot at f1.4 with the nex and i love it, but i am drooling thinking about how the background could look with a FF at f1.4...
Never have a FF and i am thinking that they will have a good resale value after a year or two (compared with MFT that is bringing 4-8 new cameras/year), so, if i will get tyred again, there will be no problems switching.
If you were a tired 50D owner, if you switch back to a DSLR you'll be a tired whatever-DSLR-you-have owner If you already know you won't carry around a DSLR, all the bokeh in the world is meaningless if you don't have your camera with you. Even a compact camera would be better in that situation.
I sympathize though. Sometimes I want to have my cake and eat it too--have a small, light system with FF image quality. Hopefully the day will come when some manufacturer figures that out, and when they do there will be much rejoicing.
regarding the lens, i have to 2 problems:
1) Pro MFT - all the lens are telecentric (rays of light are perpendicular on the sensor) - that, theoretically, could improve the corners image quality.
The telecentricity requirement was for regular 4/3, not Micro 4/3.
How much affect these the quality of a monitor viewing/ large print - maybe some of the switchers could tell.
I would say that m4/3 lenses are very well designed, precisely because they get the balance right between optical excellence and software correction. A careful balance between the two is what keeps the lenses performing well in such small packages. Theoretically there's a limit to how much you can correct for flaws in software, but for my use I haven't seen m4/3 push the boundaries beyond that point. Basically if you didn't tell me there was software correction I wouldn't know from looking at the pictures. If you want measurements, slrgear.com does a good job with m43/ lenses. I think you'll see that the best m4/3 lenses are stellar.
Then again I'm not a guy who pixel peeps from corner to corner on every shot, so consider my comments in that context. People who need to have everything in the frame absolutely tack sharp should stick with the better optically corrected lenses like the Panasonic 7-14mm and 25mm. I, on the other hand, am perfectly happy with some optical compromises for smaller size, which to me is the essence of m4/3.