I usually only rely on an antitheft system when i am away from the vehicle.
Your system seems to require the driver to be present so is more an anti-carjack system.
That is an extremely rare event in Australia
Hm, due to the more sophisticated anti theft systems - it is more into acquisition of keys.
A friend of mine is one of the chief security guys at a bank in Frankfurt
has a permanent carry license, very difficult to get granted in Germany at all. Most security guys have it only while at work..
. - we meet occasionally at range. And he is quite a familiar face at police.. because he grabs here and there a thug.
So what happed.. he purchased a quite powerful BMW.. (happened in 2019)
So one week after getting the car (brand new - in a garage) - One key was in a hidden safe - the other was with him.
When he returned home from work (with another vehicle) he found 2 guys in his home searching for the car key of the beamer.
.. As this guy a bit a "Reacher" he sorted this problem quite fast.. (Not even using the firearm) and the 2 lads were ready packaged for police to be picked up.
Police was a bit shocked .. they were first thinking he killed both .. what would have caused a bit more bureaucratic work.
What the guy was wondering about - how did the thieves learn about where to find this vehicle. - It had less than 120 kms, brand new.. one week registered and noone knew about it.. except dealer, insurer and registration office. Who leaked where to find the car?
Long Story short - most cars here that are of "interest" by certain people are all equipped with some antitheft capability, immobilisers, track and trace.
So the easiest way would be get the key and shift the vehicle in a HGV or transporter with all metal cover as a faradays cage to prevent locator communication..
People are rarely trained like my pal.., firearms for protection not permitted..but people usually do not treat car transponders as a "value" so on a wallhook, or on the kitchen table.. - easy to find and to snatch.
Most prefer stealth mode .. although certain groups tend to go for brute force to acquire what they want.