Mac Pros, Ara, and Modularity
It really startled me that the comparison was the Pro vs the Ara, and not the Pro and the Ara.  The Pro is very much in the spirit of modularity.  True, everything written demonstrates the different level of granularity of modularity between the Ara and the Pro.  But to the consumer, the forward facing arguments are exactly the same: "Buy what you need, each separately, and link them all, as needed rather than a huge AIO - one size fits all".The Mac Pro is requires you to bring your own HDs, bring your own expansion cards, bring your own network gear. Which centers the Pro itself at the core of a modular computing center.