Certainly helps the issue of storing a dolly at campsite/home... but as it is still only lifting the front wheels - still restricted to only cars can can be towed '2 up/2 down' - eliminates most 4WD/AWD.. Anything that can't be on a standard tow truck and needs a flatbed (or 4 down) wouldn't work here.
Much more weight on the RV frame - I assume well distributed - but still likely only possible on the large industrial chassis as FW28z said.
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