My Harley shop only works on bikes 10 old or newer; in this case it has nothing to do with the tech as many of their older bikes were not much different from newer ones at the time.I dropped by my local MC shop to see if they wanted to work on my '85 GPZ900. They looked at me like I was insane.
Last time I brought a bicycle to a shop they either acted like they were unfamiliar with the component (a freewheel needing diassembly); or maybe they were truly ignorant. I do not know about others regarding their work, but when someone wants a job done I will educate myself in order complete the task at hand and will be prepared for the next one coming through the door. I now know what derailleur clutch is and why it is; but it requiring a special/proprietary tool I doubt I have it in the box.