As I said, obviously, the older generation still casts aspersions at the younger, as likely always be. But my point is, at from my view, I can't identify anyone culturally ascendant in the way, say, Elvis was, something uniquely tied to another, as it were, ascendant culture. Even something like, say, Lady Gaga, to me me, seems more David Bowie 2.0 than anything. There doesn't seem to be any flappers, any jazz. Even rap predominates not from the millennial generation but from the 70s and, most predominantly, Gen X. But, of course, maybe the problem is expecting, that's part of the problem, possibly, of existing in that interregnum, it's in normalized and tacitly internalized for some of us to think in terms of cultural churn, of course, while we're probably looking for the very opposite.

And I would agree that capitalism has gotten very good at assimilating and anesthetizing culture. (One need only look at surrealism to see that; or the more recent bourgeois appropriation burlesque.) But in that regard, and in light of this discussion being prompted out of the disappearance of mediums themselves and that which is transmitted through them, as Hans Richter pointed out, gathering together a retrospective on surrealism in a place of cultural sanctioning (a museum) was borderline trivial, whereas so much of the object generative output of the Dadaists was fashioned with and from materials with a life expectancy of a McDonald's hamburger wrapper.

(On your last sentence) In one respect, this is very interesting in that, if you want to take Will Self as... Well, let's just say, for the moment, that he is predominantly factually correct in the idea there can be no more avant garde, that there's nothing that can't be said. This then may be existential threat there is to capitalism. That is, we say there is nothing that that capitalism, like some sort of immune response can't envelope and neutralize, then what of the fundamentally apocalyptic nature of capitalism? Which why I will still, only half jokingly, say that Francis Fukuyama, in his ardent support, came the closest any human may ever come to killing capitalism single handedly.

So we need degeneracy in order to define ourselves, yet by merely referencing the same recycled degeneracy, we separate definition. The problem is, is former traditions that existed, the given present generation were not just one with the prior generation, but that generation was in turn subsumed in the larger idea stretching back through the millennia. However, now, that is not the case. Now, with the domination (for lack of a better word) of 'Boomer' culture, Gen X and the Millennials (allowing for little use any of those terms possess) are rolled into the 'Boomer' culture, whereas the 'Boomer' culture breaks from everything before, standing at this post WWII level where the Enlightenment has culminated in the twentieth centuries great project of ultimate modernity. And that's fundamentally different. It's one thing to say that we that we are all together in a given idea of history and culture and place that seems beyond the scope of us all that molds us all; however it is another to be impressed upon to recreate the image of the previous generation, and image with no more depth to it than that of previous generation; here, I think, the dynamic is too close; that is, it is difficult, say, to argue directly in any embodied way with cultural history that is just an idea, however, to sit across the table from that which seeks to replicate themselves in you, seemingly, for the simple egotistical nature of such, is something that will inspire reaction to and, likely, against. Yet, where can this reaction go if everything can be commoditized and therefor anesthetized, rendering it an agent of the creation of the very thing rebelled against?

So they will sell the rebellion. (Let us bring out the freedom torches, please.[1])

Perhaps, then, the next generation will have to extended even the Dadaist project, and make themselves the shoddily constructed cultural products which disappear from history, disintegrating in what trickles through the gutter.

[1]https://en.wikipedia.org/wiki/Torches_of_Freedom