To me a good canonical question has the following attributes:

 - Addresses a commonly encountered question.
 - The question itself is fairly clear.
 - The answer is sufficiently concise to be readable, but detailed enough to be a complete answer.
 - The answer is widely accepted to be the best answer for the question.
 - Can be used as a Duplicate-Of target for close-votes

That last point is why so very few of our canonical questions are on meta.

That particular question, regarding *AMP installers, is primarily about *category topicality* which isn't a good fit for the [meta-tag:canonical] tag. If it's anything, it'd be a better fit for [meta-tag:faq]; the question is in a similar vein to [this one about professionals][1].


  [1]: http://meta.serverfault.com/questions/1760/server-fault-is-for-system-administrators-in-a-professional-capacity