I would think if -every- country changed to driving on the right, all cars could be LHD, and that would make vehicle design and supply chains simpler and lower

I would think if -every- country changed to driving on the right, all cars could be LHD, and that would make vehicle design and supply chains simpler and lower cost? Depending, of course, if people are actually driving in the future, but having thought a bit about it maybe in the near future there won't be the need to have a physical connection to the steering rack or pedals so switching the driver's side will be easier and simpler in the future. Buying a car from anywhere in the EU or wherever would be a lot easier, as it is a lot of 'grey' imports in the UK tend to be from Japan, I think, as they're RHD and have interesting vehicles in good condition.