Bottom line (at least with me) is, a 5 wide RB is no good for anything but a producer that isn't transporting rounds anywhere. Far as the net versus twine thing goes, I've did the cost analysis both ways and twine always comes out less expensive per bale, whether it's 10 or 100 or 1000. I takes more time to wrap than net, granted and I'll use net over twine if I'm looking at a pending weather event (I keep the net loaded and the twine boxes full, always but if I don't have time constraints, it's twine. Poly, not sisal. I'm not sure you can even buy sisal around here. I see no advantage in it, only disadvantages.
All my rounds get transported via public roadways so a 5 wide is a no go for me.