A minority of individuals may elect to have personalized modules sitting at home so they can leave their vacation stuff and the kids’ soccer gear in them. They’ll still want that convenience.

The vehicles, however, will no longer be driven by humans because in 15 to 20 years — at the latest — human-driven vehicles will be legislated off the highways.

The tipping point will come when 20 to 30 percent of vehicles are fully autonomous. Countries will look at the accident statistics and figure out that human drivers are causing 99.9 percent of the accidents.

Of course, there will be a transition period. Everyone will have five years to get their car off the road or sell it for scrap or trade it on a module.