While most drivers "eluded" to not wanting to be "the first one to a wreck", mostly the reason had to do with several factors, a couple of which have been mentioned.
1) Status... most drivers wanted the status of driving "a hood", and while for the most part at the time of the demise of cabovers, it was a lot easier to drive a cabover in tight places.
2) Ride.... meaning sitting on top of an axle compared to sitting halfway between two axles mean you felt every bump, every dip in the road. Even with equal wheelbases, the driver felt more bumps with the cabover than a conventional.
3) Getting in and out of a cabover was a little bit of a challenge, but even when swing out steps were added, it didn't help because the industry (ie drivers) had already started opting for conventional tractors.
4)Space... Nothing has more space than a cabover that I know of, but drivers were willing to give up some room in exchange for a more comfortable ride. When the Feds extended the overall lengths trucks were able to attain, companies were able to buy longer conventional trucks with bigger beds, more storage space and compartments.
5) Companies seeking better drivers, more experienced drivers, or just more sheer number of drivers were buying conventional trucks instead of cabovers and getting the drivers stuck in cabovers to make the move to their company. Since there was a shortage of drivers, and a good market for used conventional trucks, it made better financial sense to buy or lease new conventional trucks, instead of cabovers. Company's that stuck with cabovers for the extra room, better turning radius lost out in the resale market, and in the mid 80 to mid 90 really took a hit when they went to sell their used fleet. The only people buying "used cabover trucks" was the owner operators, and they did it simply because of the cheaper price. When cabovers were not longer built in the US, the used market soon dried up.
David from jax