The Sports Car: Anacronism?

When were sports cars last used for competitive sports?

Surely not since the early seventies? Le Mans and Grand Prix cars have evolved way beyond the possibility for production road versions, and as the 70’s progressed Rally cars also moved away from the sports car model into its current guise of the souped-up and heavily modified saloon car.
Similarly televised motorsport is dominated by the British Touring Car championships, and in States they have Nascar, again using souped-up and heavily modified saloon cars.

Is the sports car, long a classic icon of wealth, elegance and performance, an anacronism? Is it now just a dead-end and flat-out statement of disposable income with little or no redeeming aesthetic or social meaning?