Dinosaurs are long gone and collectively we understand that their exit was prompted by the (K–T) extinction, a mass extinction of some three-quarters of plant and animal species on Earth—including all non-avian dinosaurs—that occurred over a geologically short period of time approximately 66 million years ago.
I've come to the conclusion that a portion of fandom, my own demographic, has been naturally going the same route within the comic book industry since the early 1990's. I have had comics around throughout my entire life from before I could even read in fact. Now in my mid-50's I increasingly feel either antipathy or indifference towards the wares of DC Comics and Marvel Comics. Each of these "big two" publishing powerhouses has made every effort imaginable to maintain what we all know to be a shrinking readership, but you would never know it looking at what is sitting upon the shelves in most comics specialty shops. It is a mind-numbing experience pondering what to purchase out of the hundreds of issues comprising the last several months worth of every single series, plus the often dozen or so related titles within each "family" grouping and then to also have to determine how a half dozen active "versions" of each major character are indistinguishable in their own right? I can recall when the monthly letters page chatter used to jockey around the Earth 1 or 2 JLA/JSA crossovers; and that was only a handful of characters. Back in the mid 1980s DC decided that enough was enough, and we got Crisis on Infinite Earths. Twelve isues, a linewide crossover and then a major reboot that settled things once and for all. At least until the sales figures came in, and well you get the picture. Crisis has continued annually ever since. Oh sure, they call each seasons marketing "event" by a different name, but its really all the same conceit.
Diversity too seems to have unfortunately become little more than the kitschy glamor vibe of the moment, with one established character identity after another perpetually getting remade as an ethnic variation or a gender swap, or to a same-sex gay option supposedly because of audience demand? I don't think so. Each company already had plenty of non-caucasian characters and some homosexual heroes or supporting characters, and some were featured regularly. Moving those to the forefront and increasing their prominence in the wider fictional universe has occurred, but the replacments just keep right on coming unabated. Another ebb tide is the routinely manifested white, blonde female superhero who soon finds her love interest in this politically correct climate to be the nearest black male superhero. Time and again we've seen this and while this reflects reality, it has been done to death largely by caucasian creators who must believe that they alone are introducing this idea for the very first time? We seem to have entirely skipped past any healthy presentations of black male/black female relationships, much less actually doing the hard part and creating a brand spanking new intellectual property to stand upon its own merits. We've gone straight to the default polarizing choice over and again, and face it Tiger; that is exactly what sells headlines once the "haters" begin spouting off at the next introduction or romance along these lines. It would be foolish to believe that the publishers don't expect and/or prefer the vitriolic backlash of these gimmicks. Alas, even my head canon fanboy choice can no longer stand the bombardment. Cacaphony rules the day. I'm baling out while I can retain some degree of appreciation for nostalgia if nothing else.