Design for Simplicity
Great article. For me you addressed the real issue in your last paragraph, "Likewise, IT vendors must make simplicity core to their design mission."
As vendors, we all need to embrace a new mindset of simplicity. The complexity of our IT environment is increasing by virute of being on the steep slope of an exponential grown curve. If we don't all setup and re-DESIGN IT for simplicity, we'll be buried in complexity.
The good news is that we are starting to see this new mindset in both the infrastructure (scale out vs. scale up) and IT management (IT Management as-a-service).