very true. my mum used to be a driving instructor and she told you how to do everything PROPERLY not just to pass your test.
every 10 years may be a little impractical, but 15, 20 or at a certain age would do nicely. for one, things are changing so much on the roads now that someone who passed 40+ years ago is unlikey to have learnt about modern road systems. It was on the news that many drivers were going to be 'confused' about the proposals to drive on hardshoulder in heavy traffic on selected streches of motorway (a switched lane). They shouldn't be confused!