'Conventionals' are a beautiful sight to behold, that is beyond doubt. There are some over here in the UK, but from a practical point of view they just wouldn't work. Most of the places we have to deliver to here are in cities based on medieval or Victorian road layouts, space is very limited as a result. Cabover Artics (Articulated trucks pulling semi trailers) are the most practical way of doing things, they can turn in the length of the trailer on the spot!. I've done manoeuvres with my truck that most car drivers would run a mile from! Biggest trailers I pulled were like this, double deck fridge trailers; 16ft high with a gen set on the front and 80+ roll cages inside, always top heavy, I drove them at night on twisty country roads, very scary but beautiful scenery at the same time. Toughest one I drove was this Milk Tanker back in 2008 collecting from farms around Stonehenge! The trailer is short (30ft instead of the more usual 40-45 ft) and the rear axle on it steers, so when you reverse round a corner it comes round twice as quickly as a regular trailer. Had to watch it like a hawk! Met a lot of cows on that job, nice girls... Mostly though I drove motors like this (well it was mine 2012-2016, great motor, practically drove itself!): 44tonnes gross weight loaded, 440 horse under the cab a smooth as silk on the black top!