In his longer works, Ballard's ideas often wore a bit thin. In particular, his late novels (Cocaine Nights, etc.) are the longest — beautifully written, sure, but they are essentially reskinned versions of his earlier High-Rise and Running Wild, where he already perfected the motif of humans in gated communities reverting to base, animal, violent behaviour. We didn't really need those; he'd already made his point.
I do recommend getting his "The Complete Stories of J. G. Ballard" (not to be confused with "The Complete Short Stories of J. G. Ballard: Volume 1" and "Volume 2", both of which it supercedes). It includes classics such as "The Concentration City", "Studio 5, The Stars", "A Question of Re-Entry", "Billenium", and "The Garden of Time".
While I've always enjoyed Ballard's coldly satirical perspective on modern life (The Atrocity Exhibition maybe being the pinnacle of this), I think he's at his best when he gets looser and a bit weird. Nature succumbing to strange mutations feature in The Drowned World, but The Crystal World is absolutely supercharged with hallucinogenic weirdness, a fever dream that turns magical-realist in the end. Later novels touch on this man/nature dichotomy, but not as strongly as his earlier work, although late short stories like "Dream Cargoes" revisit that theme.
If we want to look ahead to 2034, who is writing the novel that defines the next decade?
Or to think of it another way, what would Ballard write about today that he would see coming in 2036?
https://sseh.uchicago.edu/doc/roauss.htm