nothing confusing here, if you move to another country then you follow the rules and law of that country. If you wish to keep your UK car then there's plenty of info available about re-registering, so what if it's a bit difficult, moving aboard is always going to throw up challenges. Ignorance or laziness or trying to save a few bucks is no excuse in law! On a recent trip back to the UK I noticed a number of UK plated cars parked up in customs, when I asked the customs guy why, he told me they were all cars that have been impounded as they had no road tax or MOT, not the best way to start your holiday or visit back home, is it?