Unless it is timed correctly, a good idea is not merely no better than no idea at all; because of time, effort and money that goes into making it happen, it’s actually quite a lot worse. I wonder if that’s how BMW now feels about its visionary i3 and i8, one a hatch, one a junior supercar, both now celebrating their 10th birthdays, both so unsuccessful they were not replaced? Both made extensive use of carbon-fibre reinforced plastic to make them light, both were wildly, laughably ahead of their time and the only problem with that is we’ve just not realised it yet.