> Of course it might be harder to keep a Cybertruck running for 50 years due to all the computerized components. Restorers will probably be relegated to rebuilding Cybertruck bodies with new components.

Really no different than any classic car, really. GM isn't selling OEM parts for a '57 Chevy, for example. If you need replacement parts on those, nowadays, you're likely going to specialty manufacturers given there really aren't any "parts cars" around anymore.