I sometimes entertain a fantasy where I have a car for which I pull out 75% of the batteries and leave them in the garage for my daily commute. Then for a trip

I sometimes entertain a fantasy where I have a car for which I pull out 75% of the batteries and leave them in the garage for my daily commute. Then for a trip to grandma's, I put them in. Along with the range extender. Oh, and the range extender is just plug-and-play; I can swap in a Honda, or a Briggs and Stratton, or whichever. It could be gas or hydrogen or nuke. Most of the time it just sits under a bench in the garage. This fantasy highlights some of the absurdity of modularity. A car with only 1/4 the batteries and no generator will handle completely differently. It would really be a different car. But "reconfigured" in less than an hour by a complete luddite. And, "nuke"? Really? Why not imagine the owner could just snap in and out between 2wd and 4wd drive trains? Choose to insert one electric motor or two (or four?) depending on the day? What could possibly go wrong? Still, it's fun to fantasize. And maybe some of it could make sense. Like unplugging the driver controls and just moving them over to the left or right seat and plugging them back in. Wait... what?