I've been saying for a while now, there will be no more 'classic cars' starting after the mid-1990's because of the failure of electronic parts that will not be able to be replaced. The best that will happen is people using the shells to 'restomod' them into new cars that look old. Even today, it's much easier for a beginner to buy a broken 1970's car and get it running than a broken 1990's car.
You underestimate the enthusiasts. I just recently bought a refurbished “distance system” computer (aka cruise control ecu) for my 89 325i. I have, on order, an original head unit with blue tooth retrofitted.
Electronics won’t be the Achilles heel of old cars. Gasoline will be. But make no mistake. Old electric vehicles with their max 10-year life span of battery banks won’t enjoy the life of a classic either.