I quite agree - many people probably don’t need high MP, and simply want the “latest and greatest” piece of kit, in the belief that it will magically improve their photography.
My point was that we all have different needs, and that when choosing kit we should avoid being misled by advertising hype, and instead carefully analyse what we actually *need* and can afford for our own particular subject types and styles of operation.
It’s probably true that most photographers need no more than 15-20MP. But there are many including myself who genuinely need high MP for at least some of our work. I could easily get away with 20MP for 90% of my work, but I need higher resolution for the other 10%.
Another way of looking at it is that it’s better to have too much than too little, both in terms of megapixels and overall specification. We might be getting absolutely satisfactory photographs with a relatively low res machine, but it’s good to have something “in reserve” for those occasions when more is needed.
The only issue I have with high MP cameras, as Jeff Cable also pointed out, is that it would be extremely useful if the user could select different FF resolutions on any particular camera. A camera that could switch between 24, 48 and 96 MP would be rather nice.