Not Disney, but the Hogwarts Express seats multiple groups. I consider it a ride/transportation. The trip is shorter and not sure if they have cameras but there is no view into the train from the outside. At least some of the Gondolas have a clear view from the outside. While most people would probably prefer their own gondola, it doesn't seem practical, especially during busy times and for small parties, if the primary role of this is efficient transportation.
Like any theme park "dark" ride, there are cameras throughout on the HE. (Which, BTW, is also manufactured and maintained by Doppelmayr. Technically, it's a funicular.)
It's the best analogy, true, but the difference there is the load setup. You do a very long queue and the pre-grouping thing when you ride, so you have a rather long time to decide who will sit where, and you could let someone go ahead of you if you wished to switch to a different cabin. Also, Universal employees ride along out in the corridor.
Incidentally, there was a power failure on the HE on an afternoon in Aug 2017 that required the Orlando Fire Dept. to evacuate it. The A/C failed with the power, and there were guests treated by paramedics for heat-related illness after being stuck in the cabins for a little under an hour. (Those cabins are not vented like the Skyliner, of course.)
In general, I think that the issue with the "riding with strangers" uneasiness that some people have on the Skyliner is a combination of factors: 1) They are airborne, 2) there is no "official" operator in the cabin to serve as a buffer/witness if any malfeasance happened, nor surveillance cameras, 3) the benches are facing, so you have to find somewhere to look if you are sensitive to the possibility of staring issues, and 4) they are small, forcing fairly close proximity. (Also, as a 5th factor, you can see out, which means you can also clearly see the distance to the ground.)
With most theme park rides, or with buses or trains, the fact that the vehicle is on or close to the ground lets riders believe that they *could* get off whenever they want to, and that if there were a breakdown they could just climb off. (Yes, jumping ship while the ride is in motion would cause an e-stop and might not be precisely safe to do so, but I think that knowing that it is physically possible makes the situation feel less claustrophobic. James Bond films aside, there is really nowhere to go to get out of a moving airborne ropeway gondola until it reaches a station. All this is also true of the monorail, of course, but in that case I think that the sheer size helps as well; just as those who fear boats tend to trust a cruise ship more than a rowboat.)
PS: for the poster who asked if 10 adults will fit in one cabin, the answer is technically, yes. That is the maximum capacity they were designed for. With 10 riders, the space on the bench for each is 18 inches; no one may stand while the cabin is in motion.