In my garage I have a Lamborghini, a Porsche, a Rolls-Royce, an Aston Martin, a CAT excavator, a Ferrari, even a Volkswagen (because I'm a man of the people). Some times I just want to go on a road trip with a few of my buddies. Of course I let each of them pick a car to drive in, I've got so many to choose from, and I can only drive one at a time!
I bet if we found or invented some Japanese word for it, the harem/sharing combination would be accepted as well as all the other dumb story tropes from the land of the rising sun.
Also, while the stories are quite often fun, and also very interesting at times, I'm glad to read that new gameplay mechanics are coming. It's not that fun to boot up the game to grind out new scenes to watch. That loop was a lot of fun in the beginning, but now that I'm financially secure (in-game too), I need something else to keep it fun to play.