I don't think human society has ever evolved past what this article would describe as "average" at any point of its existence since recorded history began. Sure

I don't think human society has ever evolved past what this article would describe as "average" at any point of its existence since recorded history began. Sure there were bursts of "creativity" and "diversity" at some points but they were usually just experimental prototypes that haven't yet been tested by market selection. Carcinisation is an example of this in nature. Cars looking all the same isn't really a new thing. The illusion of variety in the 1980s-2000s era was just old cars not yet being phased out by regulation changes. Modern cars have far better function at everything than older cars while only an extremely small price on aesthetics was paid in exchange.