You seem to have a strong hatred towards sprinters and Truma units without ever actually owning one.
These are just off the top of my head, please go to any RV show and you will find Truma Combi's everywhere now, and pretty much a permanent fixture in the European and Australian markets. To suggest they are problematic, is false.
I have no hatred towards either but they aren't for me. I merely have strong opinions. I have not owned a Truma unit or a Sprinter but have put hundreds of thousands of miles on company Sprinters and dealt with their problems as well as helping many others. The number of headlight bulbs and turbo boots I've fixed is disturbing. They are a great city/travel vehicle as are Transits and maybe even that Dodge thing, though I've sold the Transit to the left. I simply don't trust Sprinters or most new vehicles, especially diesels, for going off the beaten path. I think all of these #vanlifers with disposable income are finding that out the hard way. They are NOT a robust LC, Jeep or domestic van or truck. They are way too complicated. This same basic principle applies to the Truma unit in my mind. I don't have time to chase down where I've read of problems but I have and I think they are way too finicky for most.
An overlanding vehicle is worthless if you cannot repair it in the field, as are it's contents.
An overlander (person) is worthless if he/she cannot repair things in the field.
The only thing on your list that is remotely an off-roader or made for getting off the grid is the Sportsmobile. I've owned a few. Ever tried to repair a Starcool? It's another overly complicated, expensive and now defunct choice of theirs.
When a Sprinter diesel/Transit diesel/anything modern diesel throws a code and derates in Death Valley you've got serious problems, potentially life threatening.
When you spend thousands on a whiz-bang microwave/toaster/hot water heater/furnace made in Europe and you are camping with your wife in Alaska with your wife and you have no signal, no not water and no heat then you also have serious problems, potentially life threatening.
There is nothing remotely interesting for me at an RV show. I'll be in Death Valley or Alaska with trusty old propane or better yet, fire.