I have a little different viewpoint.
Many website and forums (such as this one) came about during the first decade of the 2000s, when digital cameras were an emerging technology and the pace of change was very rapid. Companies were releasing new products that tended to leapfrog one another and there was a lot to write and talk about.
As with any technology, digital cameras have matured and the pace of change has slowed. The truth is: 99% of digital cameras made today are perfectly fine for 99% of the photographs being taken of 99% of the subjects under 99% of conditions.
That leaves only those 1% issues to deal with. No company can afford to go after 100% of the customer base. It's just too expensive and offers too little return.
But, with less to talk about on forums, people fixate on tiny differences that are irrelevant to the majority of users. As with any topic, the more obscure it becomes the more intense the feelings are and we see more than our share of that.
+1,000 ... Nailed it!