Do you believe that mechanical keys were a deterrent before the introduction of the immobilizers? And if they were why did they bother with immobilizers, anti-theft alarms, and GPS trackers?
Keyless cars top the list for most stolen cars across the UK, with around 93% of all stolen vehicles in 2020 being taken without vehicle keys.
Here are stats for UK. Total cars stolen in UK dropped from ~300K to ~100K in the last 20 years. [1] Even though number of cars keep growing [2]
[1] https://www.statista.com/statistics/303551/motor-vehicle-the...
[2] https://www.statista.com/statistics/299972/average-age-of-ca...