This idea that there is a shared or converged sense of aesthetic or preference is really peculiar as it doesn’t match any of what I observe.
Convergence really seems to happen solely due to economics, particularly mass production combined with marketing to drive demand for those uniform items.
like the way the airline market converged on how they can charge people extra to be treated like humans. And charge extra to resolve arbitrary and clearly contrived annoying policies? That’s caused happier users?
Also calling an airline a market is kind of iffy in many ways. It's highly regulated to keep planes from falling out of the sky. I'm sure there are many airlines that would give you a lot more space if they got rid of the crews that ensured all the bolts weren't about to fall out of the plane.
Convergence really seems to happen solely due to economics, particularly mass production combined with marketing to drive demand for those uniform items.