[BJR]

here is a bobcat with a general purpose bucket loading a truck.

Imagine that when the load from the bucket has to be dumped the bucket has to croud, twist, foreward to do so. Thus the front of the bucket is much lower.

With a 4 in 1 bucket you can open the front part up as you croud the bucket foreward. This gives you a greater loading height.

Therefore this machine could luad a truck right to the brim whose sides come up to the arms of the machine.