Re: The end of any driving pleasure
The pre-ECU cars you are talking about will continue to exist (mostly in museums), but none of the current generation of vehicles will be driveable in 40 years time. At some point one of the many irreplaceable, unrepairable and undocumented blackbox control units will fail and that will be the end of it.
Whipping out the EFI and retrofitting carbs is a well worn path for most vehicles - absent a blower it can be the cheaper route to bigger power gains. Alternatives are home brew ECUs like MegaSquirt / MegaJolt or another aftermarket ECU.
Under all the advanced electronics, live the same greasy bits of the old carburettor based vehicles, and for the most part it can be torn out. The car may suffer somewhat in terms of performance, and things like a GTR will flat out die, but taking inspiration from Cuba, petrolheads have been a fairly resourceful bunch in the past. I have faith in us.