Truck camper, van conversion or rv?

[RMHenna]

Wanting to buy but have questions. What are pros and cons of each? On the surface, a truck camper seems very versatile, though I rarely see people who own them take them off. That defeats the versatility. Conversion vans can be good, they're smaller, but seems to be a pain in the back pockets going from travel/meals, to sleep. Next are the smaller RV which seem to be a great overall option but don't know what challenges exist.
Any objective considerations appreciated.
(sorry if a re-post; can't find first one I though posted)