The main reason for a cab over is to meet length restrictions that we don’t have anymore. The visibility and turning radius might be a little better but not enough to justify it.
In heavy haulage you need a weight, length and width permit anyways so it doesnt matter. In any other transport than volume goods (dumptrailer, tanker, etcetera) length is not an issue, yet they still dont use hooded trucks for that here.
Another aspect is that European truck suspension is more advanced than American, so for driver comfort, you dont need to have the drivers seat in the middle between front axle and tandem.
I worked for an air suspension manufacturer, they met a new customer on the IAA commercial vehicle exhibition in Germany: It was a Canadian manufacturer of feed delivery trailers, looking for a better suspension than Hendrickson because they ripped them apart on farmyards. When we benchmark tested the Hendrickson suspension on our standard lateral load test (welded, pressed steel trailing arms with a big sloppy rubber bushing to allow lateral ground following) they sent us, against our standard, run off the mill European spring steel trailing arm suspension, the Hendrickson set lasted only 20% of what the standard European load collective is, while ours was lighter in weight too...
I just dont hold American vehicle design in high regard because they held on to archaic designs for decades too long... and when you look at it, Cummins is the only American designed truck engine available (Paccar is Daf, Detroit is Mercedes, Navistar is MAN, Volvo/White is off course Volvo) most vans in America are European or Jap (Sprinter is Merc, Ford Transit is European, the Chevy van is a Jap designed Nissan, the Ram ProMaster is an Italian Fiat Ducato...
Ford bought Volvo years ago, in order to put their Taurus and Crown Vic on a unibody, borrowed from the Volvo S80...