Maybe I should have bolded my very first phrase: "All things being equal."  That is the base assumption throughout, and pervades my interim conclusion of, you should close accounts less than your current average age.  However, I then made a key change to that assumption, namely, that you open something new along the way, and I further stated that it was somewhat likely that would happen.  In light of that revision, I then concluded you probably shouldn't close accounts.

 

Perhaps more strategic bolding on my part - and maybe less contradictory bolding on your part - would have made my point clearer, and shown that the post was actually quite thorough and consistent.