[rubatuga]

Don't they use time of flight?

[katbyte]

but that of course would cost more money to implement correctly with no further flaws, and many companies are opting for other solutions: https://www.carwow.co.uk/blog/keyless-car-theft-prevention

many many cars are vulnerable to it and will be for a long time.

[pseudo0]

Newer fobs, sure. But as this article demonstrates, it is very expensive and inconvenient to backport security improvements to millions of vehicles.