Yet, Porsche itself its apparently backing continued use of the ICE. Be interesting to see what happens in the UK come 2030, if ICE are still banned. Will Porsche i=only sell EV's into a very important UK market.
The issue you raise is only likely to affect the 911 and Coxter cars - the others are tarted up VWs and I would imagine that as long as they still have the Porker badge, the owners wouldnt care whether the vehicle was EV or ICE.
After a lifetime of owning and driving boneshaking sports car, I really rather enjoy the calm quiet of an EV when in one. There's no real opportunity to use a sports car in the way they are designed to be used anyway. I wouldnt be surprised to see sports cars disappear all together.