Does a car last over 20 years?

Is it worth keeping a car alive for more than 20 years? I don’t know what the financial situation of you looks like. I can’t and don’t want to afford a new car every 10 years. So I’ve been driving old cars for years until they’ve rusted through. In recent years, I’ve had to find the used car has become disproportionately expensive. Furthermore, the modern vehicles with their high amount of electronics can only be repaired by professional workshops and whether or not a car can be repaired. if the electronic ET ́s still exist in 15 years, is an open question. Let’s assume, I am looking for a car from the 80’s or 90’s. Little electonics, little rust. Has one of you had personal experience, whether a car can withstand even more than 15 years of use despite care? Is this financially worthwhile? My vehicle: GOLF 3 suction diesel, 350 TKm, everything still possible, rust is slowly becoming a problem.