I feel that the quality of spares that were used in 90's cars were really good and lasting. But, today the quality of spares that are fixed in cars are not up to the mark which impacts the reliability of the car.
Also, in those times of the 90's the cars did not need much of specialized attention from service centre as compared to today's cars don't you all think so?
Another thing that I feel is, unlike today, car companies did not face tough competition back in 90's. Hence, that time cars were given proper attention by OEMs right from manufacturing stages. Earlier there were vehicles that performed better with after-market spares too unlike today, where the reliability of the OEM
spare itself is a question.