As someone who has spent far too many years on this forum I know that the complainers will never be satisfied.
I remember the 40D owners who were waiting with breathless anticipation for the next generation of their camera (most had skipped over the 50D as a interim model -- sort of a 40.2D actually.) Then when the 7D came out they complained bitterly about the price and swore they'd wait for the 60D, which they demanded should have all the features of the 7D but be two-thirds the cost.
When the 60D finally arrived they were shocked, shocked, that it had fewer features than the 7D. And, complained endlessly on this forum how Canon didn't care about them.
In the meantime, the unveiling of the 7D caused 5DII owners to whine endlessly about their autofocus and swear that Canon had sold them out by not including a similar autofocus in the 5D.
At the same time, thread after thread recounted how Canon was sacrificing ISO performance in the pursuit of ever-higher megapixels. Readers constantly wrote in about how Nikon's low resolution sensors were infinitely superior to Canon's higher megapixel sensors
When Canon announced the 1DX, those who worshiped at the altar of "H" swore that it would rise from the dead to save the world. Any suggestion that the format had become obsolete was met with angry denials and interminable threads about how Canon had betrayed them.
As we counted down the months to the release of the 5DIII, the whiners insisted they absolutely knew that Canon would never give them an autofocus system like that of the 1DX and people would be lucky to get the 7D autofocus. Instead, we were told, Canon would jam a high megapixel sensor into the 5DIII because that was all Canon cared about.
The release of the 1DX and finally the 5DIII left the whiners in disarray. Canon had reversed course and instead of going for excessively high megapixels had released two bodies that excelled in low light. And, to add insult to injury, Canon had given the 5DIII an absolutely incredible autofocus system.
Not to worry though, it was only a temporary setback.
With Canon now setting the industry standard for ISO performance, it wasn't long before the whiners pivoted to megapixels and dynamic range. How could anyone be expected to take pictures with these cameras that had such low resolution and such poor dynamic range? (This of course, requires the complainers to ignore the fact that Nikon chose not to put a high megapixel sensor in their own flagship camera – but facts need not get in the way of a good complaint.)
It's not hard to predict the future. Canon and Nikon will continue to release excellent cameras. They will differ from one another in increasingly insignificant ways that will only be visible to those shooting test shots of garage doors with the sun reflecting on a mirror in one corner and a black cat sitting under the shade of an evergreen in the other and the image enlarged to 2,000 percent.
The complaints will continue. Canon and Nikon will continue to sell cameras. And, I will continue to waste time on this forum, when I should be processing pictures.