Does the presence of troubleshooting information serve as a valid indication of widespread issues?
40+ years ago, it was very common for manufacturers of consumer electronics to have service manuals available for every model of everything, from table fans to microwave ovens to Atari consoles.
I have one that still works fine today (except for removing the notorious RIFA film capacitors, but those didn't fail after "a couple years").
oh, ok, so if you search for Apple technical service bulletins from 40+ years ago you won't find anything about troubleshooting the various problems.
Does the presence of troubleshooting information serve as a valid indication of widespread issues?
40+ years ago, it was very common for manufacturers of consumer electronics to have service manuals available for every model of everything, from table fans to microwave ovens to Atari consoles.