Not really an old system Pgh, just most cars nowadays don't use it as it drinks fuel.
Many performance engines still use Carbs with some electronic aids, high performance V8s often use carbs as they do a better job at mixing the fuel/air mixture than injection can for a reasonable budget!
Plus the you can't beat the induction noise of carbs, nor the simplicity offered, especially to a race team if they need to change engines...they don't need to worry about wiring harnesses and ECUs!
So in reality, carbs are just as good at their job as injection equipped vehicles, its just that you can make injected engines more efficient as you can change the fuel/air mixture on the fly, which is harder to do in carbs...you set up for what you need and leave them at that.
Graham