i think the generalizations about system 'heft' has more to do with living density/economics and home and room size than location/country/hemisphere. USA audiophiles tend to live in houses in suburbs, with rec rooms over multiple car garages or basements, more than Europe or Asia. and to 'some' degree have more disposable income, and have less time off and retire later.....maybe have/had a home theater.....and stay at home for off time.
there are many exceptions to the generalization....but certainly many more that do fit.
maybe new generations in the USA might have a slightly different circumstance.....yet to play out.
hifi dealers and manufacturers tend to cater to their customer situation with products that fit (fill the space/budget).
The Asian billionaires have vintage horns, starting with WEs. So I don't think it is a size and disposable income issue. On this forum, the guys with big budgets had non-horns till Tango, General, David, Stephane (Euronor and top of the line Kondo with Continuum), Audioquattr (Cessaro Zeta), came along. Unfortunately, a wrong reason for people to sit up and take notice of horns.
Guys (Guy?) who have (has?) heard expensive set ups and likes to play likes dual FLH horns on all out budgets, and below that, Devore Orangutan O96, Audionec EVO2, hORNs Universum.
It is about getting analog recordings through, rather than mating boom boom speakers with bam bam amps. The loudness, dynamic swings, and headrooms come from low watt amps with simple circuits driving easy to drive high sensitivity speakers. The soundstage comes from the record.
Hifi dealers and manufactures drive the demand, this a push industry, not pull. They sell what has high margins, can look good, is easy to fit in, and their demo tracks and testing caters to an audiophile community that I keep going away from.