I have noticed a large uptick in service sales of some items I haven't sold much of, like seats and forks. these were customers that previously would have said "don't bother, we will be getting a new unit in 9 months" but now have been told they are going to keep the unit longer.
I don't think there is any advantage to "stockpiling parts". LOTS of reasons.
I also think there have been times in my life when I was happy to be going to be seen by the huge clinic, and was glad the doctor had lots of experience with whatever my problem was, not so much that he would hold my hand, as that he would fix the problem.

johnr_j said; "A doctor and service tech have a lot in common in my view - they do diagnostics, make a recommend proposal for correction and perform the work to get both "up and running" as fast and efficient as possible"

Now I -know- this is the serious side, but dang it I can not help myself with a lead in like that;
You do know the difference between a doctor and a forklift service tech?




The tech washes his hands BEFORE he goes to the bathroom, the doctor only washes them after.