a recent game of mine got me thinking why can't refrigerated vehicles carry ordinary 'dry' crated goods ( food cans, beer, glass, plastic, paper books etc)
i had by virtue of the game engine a cattle yard feeding to a cannery and close to the route was one of the supermarkets the cannery supplied ... If it had been a food factory ( rather than a cannery) -great that food is chilled goods so i could run back via the supermarket but from the cannery i have to set up another line and run dry goods trucks on that line rather than back loading some of the cans in the fridge trucks
in 'real life' fridge trucks and containers are used for 'dry goods' if it;s a convenient back load - obviously you have the same wieght and space limitations becasue of the fridge plant on the truck/ trailer and potentially slightly smaller volumes and for the sake of simutrans the cost could be the same ( rather than have a fridge 'on' and a fridge 'off' price)
more recent versions allow cotton / wool to be carried in the same vehicles as grain / corn ... ( presumably the grain /corn for the wool /cotton favouring vehicles is loaded in big sacks by crane / hiab / mounty FLT same as the cotton / wool )