Something we can agree on... mass production brings many variables in to
play.... allowable tolerances can meet on the production line in a
relationship that isn't going to go well... In order to reduce production
costs, the bean counters found that plaaning for an acceptable failure rate
and responding when needed was more financially viable than trying to ensure
a zero failure rate....

I drive the car I will buy... not one off the lot and then plan on
colours/options/what-have-you.... For me, I have always been able to "feel"
which ones are good and which ones I would rather not purchase....