By the “90s” I don’t mean 1990-99, but the overall zeitgeist that defined those years and the themes of that decade. It seems like many of them still applied or at least did until recently. The Post-Cold War utopianism was strong even during the early days of the Ukraine war and even now you still hear about the “End of History” and how the Web and Capitalism are going to make everyone rich and everything perfect. 9/11 did of course put a damper in that but it never changed the outcome of that mentality, America as a world police. In fact it accelerated it.
I also notice that 90s is still thought of as a “young people’s decade”, and belonging to the “greater present” in the same way that 2011 is. Ie, not distinct enough from everyday life today that it can be considered an “era” yet. Even despite all the stuff about 90s kids, which mostly centers around Nickelodeon cartoons and the slightly (okay admittedly often much) more old fashioned technology of 15-25 years ago. The fact that today’s kids love the 90s and love today though to me implies that the two are not all that different, because kids in the 90s hated the 80s.