In-vehicle control systems are typically garbage.
Several hacks have been shown where vehicle data is exposed over cellular links, in some cases with remote attackers being able to actually control elements of the vehicle (eg: Jeep).
Software updates are rare, with manufacturers often trying to charge exorbitant amounts for basic updates.
Data breaches of various customer data, credentials, PII, etc. are repeated.
IMO we are at the point where in-vehice technology is a thing that is never going away. Auto manufacturers need to become bona-fide software developers and take development, QA, cyber security, etc. far more serious than they have so far.