You could say that FX strikes the size-performance sweet-spot both for sensors and lenses? Price-performance is another issue, of course. We're just not seeing evidence that modern, mirrorless, sub 35mm, cameras lead to substantially smaller lenses.
I don't get it. Pentax Auto 110 had super tiny lenses, and 110 is basically the same size as 4/3rds. These new lenses might perform a whole lot better, but they don't really better equivalent 35mm FX, and they're not really smaller either.
.........................................
|