The thing is, a constantly repaired car is like an HD mod. It's new, but you need to understand what metal modern cars are made of. There's no comparison to the metal used in old Soviet cars.
Here's a clear example of a repair:
P.S. It's annoying that without HD, the game crashes on this map after 2-3 days due to abnormal program termination. Since I don't play with HD at all, I had to delve into the code and fix this bug myself.
You can come up with a bunch of arguments about why you should play The Restoration of Erathia from Ubisoft (for example), but it's all self-deception. IMHO.