Sports chassis and similar units becoming obsolete?

Spoon, I'll agree with most of what you said except the part about not even needing brakes. We lost the brakes on our 17K unit and had it towed to the shop by a 10 Wheel semi-heavy tow rig and we followed in our TV. The driver blew through a few Red lights because as heavy as his Rig was he couldn't stop our trailer without lots of space to slow down.
So I wouldn't want to be pulling a heavy unit without brakes very far.