FAA’s reasoning: “As, new technology facilitates the introduction of area navigation (RNAV) instrument approach procedures over the past decade, the number of procedures available in the National Airspace System has nearly doubled. The complexity and cost to the Federal Aviation Administration (FAA) of maintaining the existing ground based navigational infrastructure while expanding the new RNAV capability is not sustainable.”
“Proposed Policy for Discontinuance of Certain Instrument Approach Procedures”
August 2, 2013. Notice Of Proposed Policy And Request For Comment.