I think it’s ahead in really small ways: 1) The Sharp Grotesk typeface (and its endless widths) is a bit against the grain in popular design. The color pairings are pretty different (2017 was pretty gradient heavy). And the mix of illustration elements with different pattern fills is jarring. I am not saying this is new to design — we’ve been seeing it with the pseudo-brutalist sites for a while. I just think in terms of “popular design,” it’s ahead. I could be totally wrong though.
Weird, I’m still seeing the new brand on Dropbox.com, even in incognito:l. Maybe they changed it for you after your comments, lol.