Now now. No one really thinks parts last forever but as a former service manager I always brought the customer out and showed them what I saw and told them what was a "need now even if I didn't do it" and a recommended eventually" item. Starting out in that business back in 1976 I saw lots of crap parts because vehicles were designed to last short periods of time to help with new car sales. Now the parts are better and the vehicle quality is better. There is a market for less expensive less quality parts and lots of people use them and have the problems that go along with them.
So you are saying "Planned obsolescence" is a myth?
http://en.wikipedia.org/wiki/Planned_obsolescence
It's very common practice these days with automakers of all ranges. It boild down to big business. You don't pay to have a part last 20 years when the warranty you offer runs out in 3 years. That costs those businesses big $$$$$. I'm not saying your cam is going to shit the bed after your warranty on your new Nissan is up but I will bet you that the starter/alternator/tie-rod ends, ball-joints and other "wear parts" that used to last 10+ years wil only last you 5 at best.
I looked at a Dodge today that came in for a check engine light. Cause was an evap hose broken at the canister. I wrote down a whole list of shit that needed to be fixed ASAP.
Leaking Water Pump
RF outer tie rod end
RF inner tie ride end
Idler arm
Pitman arm
Rear main seal laking like a siv
Front crank seal leaking.
Both front axle output shafts leaking Class 2.
T-Case rear output shaft seal leaking badly.
Did they fix anything? No. That car will be back probably next month for another "I have an oil leak somewhere". I'll do the same diag and the customer will leave. He/shge will do this same thing forever until the car dies.
It's a huge waste of time for me to rediagnose the same shit everytime but at the same time, the customer at least knows what is going on with their car.
This car was a 2008 Dodge R1500.
We will tell you the truth and not sugarcoat it. If it needs to be fixed, it needs to be fixed.
Problem is when the customer ponders it over and adds another degree to the repair level.
"Does it really need to be fixed?"
or
"Does it really REALLY need to be fixed?"
I cant help you there. Your finances are your own. All I can tell you is what needs attention now or soon.