In 15 or 20 years I will trade my worthless Morgan in for an electric pavement scooter. I reckon I will have had my moneys worth out of it by then and it will owe me nothing.
Until then I will enjoy it whilst I can

Yep. It's an extraordinary privilege to be able to enjoy driving our cars and I'm going to hang on to mine as long as I can afford it, but I have no concerns about switching to an EV when the time comes.
Everyone seems aghast at the idea that iCE cars won't be very popular or worth much in 15 years, but we can all remember the days when classics weren't seen as valuable and nobody wanted them. If I'd had a quid for every time I have heard stories like "I was offered a 1959 Birdcage Maserati for 20 guineas and a packet of Woodbines, but I turned it down" then I could easily afford a Plus 6. The cycle of public perception will continue to change just as it always has done. ICE cars will fall out of favour, as newer clean technologies take over.
I see no cause for gloom and despondency at all, especially for performance enthusiasts. Motoring has always been enormously popular at all levels of society, and because there are so many branches of it there is something to appeal to everybody. Why on earth would this change simply because people choose to have a different sort of motor under the bonnet?