Randy, from your prospective (building saws for pros around the world and standing behind your work) I agree with you 100%.
But if it is a local firewood cutter making a choice between a homeowner saw or a pro saw with some AM parts, I'll take the pro saw ever time based on both performance and longevity.
I've had very good luck with both tank holders and coils, even in the hands of pros, and those two items alone can save you enough to turn a project from no to go.
I guess my point is that while I believe OEM is always best, there are situations when I'm glad that we have other choices. What is best for one situation is not always what is best for the next.
About a decade ago I had to pay $160 for an OEM tank holder for my 044 after the original was pinched and crushed by a tree. All the local dealers told me the saw was not worth fixing, so I learned to do the work myself. I'm glad there are currently less expensive alternatives for situations like that, as I was on the fence about doing it.