I own a 2017 Model S and the maintenance cost over these 6 years has been 1000 USD (change brake calipers at the end of year 6). For EV owners it’s definitely lower but damage collision repairs are probably more expensive.
Ehh .. this is a very preliminary paper in a small journal and medical devices have to undergo rigorous clinical testing before being used in clinical settings. If this will ever be clinically available, it will probably take at least 7 - 10 years.