Anyhow, if they can get into a car by this method in a keyless car then they can get into a non keyless car by the exact same mechanism ffs!
How is that? non-KEYLESS fobs don't continuously emit any signal, do they? Unless you mean the split second you press the button to unlock the car or i am completely missing the point.
Still "not every car is the same" shouldn't be so hard to grasp. To begin with, if someone determined enough wants to steal even the US president's limousine there could be a way to do it, sure. I guess we shall just stop any theft discussion then? No, because in the rest of the case I imagine thieves choose a car, say my Golf GTI, as they have guaranteed some income from selling that particular model for scrap, or they act upon request. If signal hacking offers an easy and efficient way to do it in 45 seconds as has been seen then it's reasonable to assume it could be their main plan. So they spot my GTI and try the system. Bad luck, the car hasn't got KESSY, what now? They can go old-school and try some harder and more traditional approaches or... just find another GTI with KESSY, hundreds of them out there anyway. I think I know what I'd choose if I was them...
Don't get me wrong I'm not saying non-KESSY cars are any sort of a fort, car theft did not start in the recent years. But technology is something we all appreciate and embrace, even thieves. If there is an easier way to do it they will mostly stick to that, it's just a matter of increasing your chances. See how they even prefer breaking into a house (where in theory anything could happen inside) to just pick up keys instead of breaking into the car itself. It's not that easy if you don't completely bypass the mechanical limitations any more. I also fully agree with Mcmaddy's point about "having insurance for when the sh1t happens" but I would skip any trivial feature such as KESSY when the possible trade-off is that I might have to go through car theft/replacement process with my insurance company surely - anyone been there knows it's not as easy as having a replacement car waiting for you at your driveway the next day.