I think most new vehicles are nothing more than soft shopping trolleys with a bit of creature comfort, they are not work horses like we once had. Soft suspension that has to be upgraded for the extra load which inturn changes the desighned handling ability.particualy when unloaded.

The stated tow capicity is a sales pitch, they may have good pulling power but I beleive you must have enough mass weight in the tug to control the towed item. So many mid sized tugs with three tonn hanging on the back , there seems to be no restriction on lenghts & some setups realy do not even look legal.

Take a three tonn van & two tonn tug = five. to drive a five tonn rigid flat top truck you need a truck licence, any one can do this with no experience & this my friends is scarey. The transport industry is very strict with weights & driving times but there seems to be anything goes in this field.