[slotrans]

I was with it right up until this statement:

> Centrally updatable: Sometimes best practice or corporate policy changes over time. You can update what LowCost or SecurityPolicy means later on, in one place, and that change will reapply to all resources that used it.

It sounds great but it's not. This is essentially the Fragile Base Class problem. You may _think_ that updating one of these traits in a single place will be safe and do what you want, but it may be disastrous for whoever is using it. And you're not going to find out until you deploy it.