After getting some work done, and a small touch on this subject with another architect off line as part of another conversation, a few thoughts struck me.
First, and ideally, for any and all features on a course under design commission, the architect must consider in some blended fashion:
His/her general philosophy, developed over decades of successes and less successful holes,
A constant questioning if the old philosophy needs to be rethought in general
A detailed look at the background factors in place for this individual design (i.e., public, private, climate, etc.)
A detailed look at whether a feature fits this course, this hole and this shot in context of the rest of the golf course......
Obviously, many gca's are accused of repeating holes, in essence overly relying on what they know as "fact" based on experience......truthfully, they are hired on earlier projects and what they tend to do. Ideally, the balance ought to shift readily from the general background thoughts to very site and hole specific ones.
Thus, when Ian, Tom, or I quickly state we are for or against target bunkers, we are really just relaying our long held thoughts. When other posters state opinions, they tend to do it on their long held thoughts, from the players perspective, but also (like architects) recalling specific holes where it works or doesn't.
There are very few ultra universal truths in golf design, and my next project may have zero target bunkers, and Ian may very well use a few! At least, we will have thought through why or why we didn't.