Not really relevant, but you got me thinking reading all of this.
Well, here goes.
Once I owned a car, not a Fiat car, had that car for more than 10 years, already had some 20 thousand miles when I got it. Previous owner had done all services by the book.
Now I have to admit that I did not do a lot of miles in that car cause I use a motorcycle as well, however I never serviced that car in 10 years, no oil change, no filters, no spark plugs, no timing belt, no nothing, only every couple years I added a bit of oil to keep the level up. And this was the kind of oil that you get in discount supermarkets, the cheapest kind oil that exists, nevermind type of oil etc.
After the 10 years elapsed with no service at all, something major did brake in that car. It was the drivers electric window motor.