Sales of prosumer and up SLRs are going down primarily because newer models don't add enough useful features to justify the price. The new Nikon D850 looks like

Sales of prosumer and up SLRs are going down primarily because newer models don't add enough useful features to justify the price. The new Nikon D850 looks like a great camera, but if you have a D810 that's working just fine the minor improvements that the D850 bring could be hard to justify for the price tag ($3.3k US). People who buy that level of camera understand, moreso than the general public, that, for example, an increase from a 36 to a 45 megapixel sensor may be nice, but in the end the photos both cameras produce are still great and whoever sees them in print or exported for the internet would never be able to tell the difference.