It seems a bit wasteful to me to discard my old Subaru Forester which works just fine - but I have concerns about the safety of it were I in an accident.
Is there any way to significantly improve the safety of an old car?
All jokes aside, buy the best road tyres and brake pads (inc. discs) that is most suitable for your common driving environment.
Down here in rural Ireland I’ve got “wet / rain” tyres. Not only can I stop on a penny, the car (Audi TT mk1) can also shift pretty quick for safely manoeuvring hazards. 99% of time I drive like a grandpa :-)
Be hyper aware of drivers around you too. If there’s a driver following who clearly shows they are _determined_ to overtake then the safest option is to pull over and let them. Their sense of judgement might be poor and result in a collision where you are collateral damage.
Auto safety divided to active and passive parts.
Active part are what working before accident - powerful engine, reliable brakes, good suspension, right tires, and in many cases you could just install best components and will have better safety than on median new car.
Passive part, what works if accident happen - strong safety shell (tube frame addition like in rally cars), multi-point belts (4-5-6 points, instead of standard 3-points), possible to install some soft and non-flammable interior panels.
For some design flaws it is possible to add fixes - for example, first ZAZ-1102 Tavria's have flaw, that on accident hood broke off the hinges and flies through windshield accurately to driver neck, and in later machines welded to hood safety corner, which hooks to frame if hinges broken.
Also you could add reinforcing arcs and many other addons.
And least, armored capsule made auto much safer, but it cost/weight could be prohibitive. Usually it implemented on large autos, like f-250, with large size/weight and large engine, but technologies grow, once it will be acceptable for smallest cars.
Active safety systems are a net meant to prevent a bad decision from turning into a worse one.
It‘s a pretty safe car for the driver and passenger. The modern tech generally avoid accidents (notably esp,abs, ebd). Keep your beakes & tires in a good shape, check the integrity of your seat belt ( loose screws, torn belts) and airbags(if any).
The studies are mixed, but for a few more bulbs, you'll be a bit safer.