It perfectly fits my needs in the cockpit
I want reasonably good IQ and low light capability
But don't want the bulk or weight of dslr ...
But a DSLR is not the only alternative, or even the closest one; mirrorless systems are closer. And of those, NEX is worst for compactness of a complete camera with zoom lens. To me the Panasonic GX1 is the closest, not only in name.
With either 14-42/3.5-5.6 lens, the Panasonic GX1 kit is at least 20% lighter.
In height and width, the Panasonic is a hair smaller.
With the cheaper lens, the Panasonic kit is longer, and equally priced.
With the collapsible "X" lens, the kit is the same size or smaller, but costs 20% more.
The sensor size difference is about 12% linear, good for about a 1/4 stop speed advantage to the Canon if sensor technology is similar.
The Canon has a greater zoom range of 4x (only the Olympus 12-50 offers 4x in a mirrorless standard zoom).
The Panasonic has a far greater range of focal lengths if and when one needs them enough to carry a second lens, while being arguably more portable on the occasions when one zoom lens is enough.
The Canon has a "peep-hole" VF in addition to the LCD, but it is non-TTL, no no use for manual focusing or DOF judgements, and probably with inaccurate framing, especially at close range.
The Panasonic has an optional EVF, probably far better than the optical peep-hole, but it adds to the cost and bulk.
By the way, the dust issue mentioned in another post is a bit of a red herring: if you can accept never being able to change lenses on the Canon, you can surely accept sometimes not being able to change lenses due to dusty conditions.
P.S. It is not just "X" that is being overkilled, but "X1". Did we ask for a GX1, G1X, 1DX and X-Pro1 all in a bunch?