All Terrain Vehicles

Most of them are motorbike type. I mean you ride ON them. Very few a "car" type where you ride IN them like this one



I have no experience with them and have several questions

First, are they any good as BOV ? Espeically the "car" types as they seem to have more load capacity.

Second, I have seen some variations that are close to dune buggy designs and I think they maybe safer ( lower center of gravity, rollbar offers better overall protection for rider) but they are few in numbers compared to the motorbike type. Why is that?