And I hope this gives Tesla some direction as to the necessary bug fix. Instead of limiting the outage polling to superchargers within driving range, they should extend the set of requested IDs to any locations within, say, 100 or 200 miles of any active route in Trip Planner. I could see an argument for also including any locations within driving range plus 100-200 miles in any direction. The net effect would presumably be at most a few extra kilobytes of network traffic per car per hour.
At a bare minimum, Trip Planner should immediately check the status of every supercharger being considered for a route as a key part of planning the route.